1970 Plymouth Road Runner
B-body · Last year of the 1968-70 Road Runner body. Restyled front an... · Beep beep — the budget bruiser's final B-body year
Highly Collectible
Production & Overview
Total Production
41,484
Original MSRP
$2,896
Assembly Plants
Lynch Road (Detroit), MI
Wheelbase
116 inches
Body Styles
Hardtop · Coupe · Convertible
Curb Weight
Unknown
Notable Packages & Production
Air Grabber — N96
pop-up Air Grabber hood scoop with Coyote Duster graphic, Road Runner cartoon decals
1.2-1.5x
uncommon
Road Runner Convertible — Convertible
Final Road Runner convertible
2-4x a hardtop
824
produced
Available Engines
N 383ci — V8
Standard Road Runner 383
335 hp
V 440ci — V8
440 Six Barrel — three two-barrel Holleys
390 hp
R 426ci — V8
426 Street Hemi — very few built, the most valuable Road Runner engine
425 hp
Buyer Checklist
⚠ Clone warning: Six Barrel and Hemi clones built from 383 cars are common — VIN position 5 decides. Always verify with cowl tag, engine stamp, and registry before purchase.
VIN position 5: N = 383, V = 440 Six Barrel, R = Hemi
Match the partial VIN stamped on the block
Decode the fender tag for paint, trim and options
Look for the broadcast sheet under the carpet or seat springs
Air Grabber cars: test the vacuum-operated pop-up scoop
Inspect floors, trunk pan, rear quarters and the rear window channel for rust
Check the frame rails and torsion bar crossmember
Convertibles: verify with Govier — there are only 824
Known Problem Areas
Hemi and Six Barrel clones
Air Grabber vacuum system failures
Rear window channel and trunk rust
Floor and quarter panel rust
Fake convertibles converted from hardtops
What Drives Value
↑ Increases Value
426 Hemi with documentation
440 Six Barrel
Convertible
Air Grabber hood
4-speed with pistol-grip shifter
High-impact colors
↓ Decreases Value
Engine clone
Hardtop cut into a convertible
Non-original engine
Structural rust
Restoration Overview
Difficulty
Medium
Parts Availability
Very good — strong Mopar B-body aftermarket
Driver Quality Cost
$25,000 – $45,000
Show Quality Cost
$65,000 – $130,000
Key Suppliers
Year One · Classic Industries · AMD (Auto Metal Direct)
Pop Culture & Legacy
Plymouth paid Warner Bros. to use the Road Runner name, cartoon and a 'beep beep' horn
The Road Runner was built to be fast and cheap — a muscle car young buyers could afford
Other Plymouth Road Runner Years