Elite Dealer

1970 Plymouth Road Runner

Addison, Illinois

Contact for Price

Vehicle Details

Make

Plymouth

Model

Road Runner

Year

1970

VIN

RM23LKDFJHGDFXXXX

Body Type

Other

Transmission

Manual

Engine

383

Description

1970 Plymouth Road Runner Plum Crazy Purple | 4-Speed | RM23 Factory Road Runner Turn heads everywhere you go in this iconic 1970 Plymouth Road Runner, finished in stunning Plum Crazy Purple, one of Mopar's most desirable and recognizable high-impact colors. This is a factory RM23 VIN-code Road Runner, representing a genuine Road Runner body style with classic muscle car styling and unmistakable presence. Under the hood is a strong replacement 383 V8 engine featuring Mopar Performance valve covers, a chrome air cleaner, aluminum intake manifold, upgraded Champion aluminum radiator, and a clean, detailed engine compartment that's ready to show or cruise.

Power is sent through the legendary 4-speed manual transmission with the desirable pistol-grip shifter, backed by the factory 8 3/4-inch rear axle and a 4-barrel carburetor, delivering the authentic Mopar driving experience enthusiasts love. The exterior is exceptionally clean with bright chrome, excellent trim, clear glass, and weatherstripping all in great condition. It rides on factory-style Mopar Magnum 500 wheels and has been updated with a new antenna and new driver's side mirror, giving it a fresh, well-maintained appearance.

Inside, you'll find a brand-new black interior featuring new armrests, black floor mats, a new interior rearview mirror, and a new dome light. Modern convenience has been added with a Bluetooth stereo and 6x9 rear package tray speakers, allowing you to enjoy your favorite music while maintaining the classic muscle car feel. Additional recent upgrades include: New USA car cover New Road Runner keychain New battery tender Fresh tune-up Detailed engine compartment New interior components and trim Before delivery, this Road Runner will be fully serviced and inspected by the MGM Classic Cars Service Department to help ensure dependable cruising and peace of mind.

Available MGM Classic Cars Upgrade Packages Customize your Road Runner before delivery with our professionally installed upgrades: Vintage air conditioning system Electric exhaust cut-out kit Window tint packages Mopar decal and stripe kits Wheel & tire packages Power steering conversion kit Power disc brake conversion kit Ask your MGM Classic Cars sales representative for complete package details and pricing. Whether you're looking for a weekend cruiser, local show winner, or an investment-grade Mopar that stands out from the crowd, this 1970 Plymouth Road Runner checks all the boxes. It offers legendary styling, a 4-speed manual, iconic Plum Crazy Purple paint, and the unmistakable attitude that made the Road Runner one of the greatest muscle cars ever built.

Financing is available with competitive rates and low monthly payments. We can also assist with nationwide enclosed or open vehicle transportation directly to your doorstep. Call MGM Classic Cars today at 847-848-1850 and let us help put this Plum Crazy Road Runner in your garage!NOBODY DOES IT LIKE MGM! BUY WITH CONFIDENCE!
Trim: PLUM CRAZY 383cid 4 SPD PISTOL GRIP
Body Style: 2
Fuel Type: Unspecified

Classic Plymouth Road Runner Buyer's Guide

Full guide

Mike Sullivan

Muscle Cars

1968–1980

~4 min read

Updated Apr 2026

Definitive buyer's guide for classic Plymouth Road Runner 1968-1980. B-body authentication, fender tag verification, Hemi and 440 Six Pack identification, current pricing.

This guide covers

✓ 10-point inspection checklist

✓ Common issues & what to avoid

✓ In-person inspection guide

✓ Market pricing by year & condition

✓ 5 FAQs answered

✓ History & fun facts

Read the Full Road Runner Buyer's Guide

Plymouth Road Runner Market Overview

Based on 30 Plymouth Road Runner listings currently on ClassicCarsArena.com

Listed Now

$68,948

Avg. Asking Price

1968–1975

Year Range

Transmission Distribution

Automatic 43%

Manual 53% ◄

Condition Distribution

Excellent 40%

Good 7%

Fair 3%

Data from ClassicCarsArena.com listings Browse all 30 listings →

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Classic Plymouth Road Runner Buyer's Guide

The Plymouth Road Runner launched for the 1968 model year as Chrysler's budget muscle car — minimal trim, basic interior, but serious performance equipment under the hood. Plymouth licensed the Road Runner cartoon character from Warner Bros. for $50,000 and used the bird's "Beep-Beep" sound as the actual horn on early cars. Across thirteen years of classic-era production (1968-1980), the Road Runner became one of the most iconic Mopar B-body muscle cars ever produced — particularly the 1970-only Superbird (the NASCAR homologation special with the 19-inch nose cone and 24-inch tall rear wing). The 1968-1971 Road Runners are the muscle-era icons; the 1973-1975 cars represent the bargain entry into B-body Road Runner ownership today. This guide covers what every buyer should verify before paying premium money for any Road Runner variant.

What to Check Before Buying

✓

Inspect fender tag rivets and stamping style — Original 1968-1974 tags use dome-headed rivets. Re-stamps are common fraud vectors.

✓

Locate and verify broadcast sheet — Check under rear seat, inside front seat bottom springs, behind rear seat back panel, in heater box.

✓

Verify VIN engine code matches block partial VIN — 5th digit of VIN identifies engine. Block partial VIN stamped on front pad.

✓

Get Galen Govier inspection for $80K+ cars — Recognized Mopar authentication expert. $200-$500 inspection mandatory for Hemi and 440 Six Pack claims.

✓

For Superbird claims (1970), demand specialist authentication — Only 1,920 Superbirds built. Every chassis documented in marque registry.

✓

Inspect B-body unibody at torsion bar mounts — Front torsion bar mounts and rear leaf spring mounts are critical structural areas.

✓

Magnet test rear quarters and trunk drop-offs — Body filler is non-magnetic.

✓

Verify 1968 horn (the actual Beep-Beep horn) — Original 1968 cars came with a special "Beep-Beep" horn that mimicked the Road Runner cartoon character.

✓

Check rear window channel rust on hardtops — Water gets trapped under rear glass. Invisible rust until glass removed.

✓

Compression test all eight cylinders — Should read 145-185 PSI uniformly. Hemi cars run 165-195 PSI.

Common Issues

Road Runner rust patterns follow the Mopar B-body convention. The 1968-1974 cars rust at the lower fenders, rear quarter panels, trunk pan, trunk drop-offs, rear frame rails, floor pans, rocker panels, and the rear window channel on hardtop coupes. The 1975-1980 F-body cars rust at the front strut towers, lower quarter panels, floor pans, and rear shock towers. Mechanically, the Mopar 383 Magnum, 440 4-barrel, 440 Six Pack, and 426 Hemi big-block V8s are bulletproof when maintained. The 426 Hemi requires specialist setup. The A727 Torqueflite automatic and A833 four-speed manual transmissions are essentially indestructible. The 8.75-inch rear axle is strong; the Dana 60 (in 426 Hemi and 440 Six Pack cars) is even stronger. The B-body unibody is structurally lighter than competitors of the same era and prone to flex damage on hard-driven cars. Push down on each corner and watch the doors. Front torsion bar mounting points and rear leaf spring mounting points are critical structural areas. Electrical issues are universal classic-car concerns. Original wiring is brittle 50+ years on. Voltage regulators on 1970-1972 cars commonly fail. Ammeter wiring on dashboards has caused fires in some cars — always check the back of the gauge cluster for heat damage. For 1968 cars, the original "Beep-Beep" horn is increasingly difficult to source if damaged. Reproduction horns are available but sound slightly different from originals.

What to Look For

Fender tag and broadcast sheet are the gold-standard authentication for any Mopar B-body. The fender tag is a coded plate listing all factory-installed options. Original 1968-1974 tags use dome-headed rivets and specific stamping fonts. For Road Runner claims, verify the Road Runner-specific RPO codes on the fender tag. The 5th digit of the VIN identifies the engine code: H=383 4V, L=383 Magnum, U=440 4V, V=440 Six Pack, R=426 Hemi. Cross-reference all three (VIN, fender tag, engine block partial VIN). For Hemi Road Runner claims, demand Galen Govier inspection ($200-$500). The Hemi engine has unique casting numbers, special engine mounts, and specific stamping codes. Re-stamped 440 blocks are well-documented forgeries. For 1970 Superbird claims, verify against the international Superbird registry. Only 1,920 cars were produced — every chassis number is documented. The Superbird package included specific equipment: 19-inch fiberglass nose cone, 24-inch tall rear wing, vinyl roof (mandatory), aerodynamic body modifications. Documented Superbird cars must have all original equipment present and verified. For 1968 cars, verify the original "Beep-Beep" horn. Original 1968 Road Runner horns mimicked the cartoon character's sound and add value when present and original. Body alignment is the second non-negotiable for B-body cars. Push down on each corner and watch the doors. Door movement relative to the body indicates chassis flex damage. Document the car. Photograph every panel, every fender tag, every chassis number stamping, every engine bay component, and every identifying tag.

Price Guide

1968 Road Runner: driver-quality 383 cars run $35,000-$60,000. Documented original-paint, low-mileage cars: $55,000-$95,000. The 1968 Hemi Road Runner (only 1,019 built) commands $200,000-$450,000+ documented. 1969 Road Runner: driver-quality 383 cars run $35,000-$65,000. The 1969 Road Runner with the 440 Six Pack: $55,000-$120,000 documented. The 1969 Hemi Road Runner: $250,000-$500,000+. 1970 Road Runner (regular hardtop or convertible): driver-quality 383 cars run $40,000-$70,000. 440 Six Pack: $70,000-$140,000. Hemi: $300,000-$650,000+ for documented numbers-matching cars. 1970 Superbird: driver-quality 440 4-barrel cars run $200,000-$400,000. 440 Six Pack: $300,000-$650,000. Hemi: $700,000-$1.5M+ for documented numbers-matching cars. 1971-1972 second-generation Road Runner: driver-quality 383/400 cars run $32,000-$55,000. 1971 440 Six Pack GTX: $80,000-$160,000. 1973-1974 second-generation Road Runner (post-Hemi era): driver-quality 318/360 cars run $25,000-$45,000. 1975-1980 F-body Road Runner: driver-quality cars run $14,000-$28,000. The 1975 final B-body Road Runner is more desirable than later F-body cars. Convertible Road Runners (1969-1971 only) command 30-50% premium over equivalent hardtops. The 1970 Hemi convertible (only 4 built) is the rarest factory Road Runner ever produced. Project Road Runners start around $20,000-$40,000 for B-body cars. Stripped roller candidates: $10,000-$22,000.

Did You Know?

The Plymouth Road Runner was conceived in 1967 by Plymouth product planner Jack Smith as a deliberately-stripped budget muscle car — the goal was to undercut the GTO and other premium muscle cars by hundreds of dollars. The original 1968 Road Runner launched at $2,896 versus the GTO's $3,253 — a $357 difference that was significant in 1968. Buyers responded enthusiastically: the Road Runner sold over 44,000 units in its launch year, dramatically exceeding Plymouth's sales projections. Plymouth licensed the Road Runner cartoon character from Warner Bros. for approximately $50,000 — a then-significant marketing investment. Chrysler engineers spent considerable time tuning the special "Beep-Beep" horn to mimic the cartoon character's sound exactly. Original 1968 horns are increasingly collected by enthusiasts and add 5-10% value to documented original cars. The 1970 Superbird was developed specifically to lure NASCAR star Richard Petty back to Plymouth from Ford (where Petty had moved for 1969). The car's aerodynamic modifications were extreme — 19-inch fiberglass nose cone, 24-inch tall rear wing — but they made the Superbird capable of 200+ mph on superspeedways. Petty drove the Superbird in 1970 NASCAR competition and won 18 races. Federal regulations required Plymouth to build a minimum number of street-legal Superbirds for homologation; the 1,920 production figure dramatically exceeded the minimum requirement and represents one of the few times Plymouth built more "homologation specials" than NASCAR rules required.

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Elite Dealer

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1970 Plymouth Road Runner

Addison, Illinois

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MGM Classic Cars

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Model History

How the Plymouth Road Runner evolved (1968–1980) — 3 generations.

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