Classic Muscle
Search cars, engines, parts...

Search Classic Muscle

Enter at least two characters to search the archive.

Enter at least two characters to search the archive.

Authenticity reference

Engine, emissions, transmission, and axle path

numbers matching · documented

Reference Details

Common issue
Swapped 360 or 400, changed carburetor or exhaust, deleted emissions hardware, manual conversion behind a larger engine, changed axle, or current drivetrain represented as born with · 1975 Plymouth Road Runner
Confidence
documented · 1975 Plymouth Road Runner
Correct value
E44, E57, E58, E63, E64, or E68 engine matched to selling market, emissions package, induction, exhaust, three-speed or TorqueFlite, axle assembly and ratio, dates, and records · 1975 Plymouth Road Runner
Where to check
VIN engine character, fender tag and broadcast sheet, engine stamp and castings, carburetor and intake, emissions labels and hardware, exhaust, gearbox, converter or clutch, selector, axle tag and housing, component dates, and records · 1975 Plymouth Road Runner
Common issue
Swapped 351 or 400, four-barrel conversion, removed emissions equipment, changed transmission or axle, or current equipment represented as born with · 1979 Mercury Cougar XR-7
Confidence
documented · 1979 Mercury Cougar XR-7
Correct value
302 or 351 two-barrel V8 matched to VIN, certification label, emissions calibration, Select-Shift automatic, axle ratio and Traction-Lok status, cooling, exhaust, dates, and records · 1979 Mercury Cougar XR-7
Where to check
VIN and labels, block castings and assembly evidence, carburetor tag, emissions label and hardware, transmission case and controls, axle tag and carrier, cooling, exhaust, dates, and records · 1979 Mercury Cougar XR-7
Common issue
Swapped 350 with four-speed, 305 with automatic, crate engine, removed emissions equipment, nonoriginal carburetor, changed transmission or axle, or current equipment represented as born with · 1981 Chevrolet Camaro Z28
Confidence
documented · 1981 Chevrolet Camaro Z28
Correct value
LG4 305/MM4 four-speed/3.42 or eligible LM1 350/MX1 automatic/3.08 configuration matched to VIN, emissions application, castings, stampings, induction, cooling, exhaust, axle, dates, and records · 1981 Chevrolet Camaro Z28
Where to check
VIN and labels, block stamp and castings, carburetor, Computer Command Control and emissions hardware, clutch or converter, gearbox, shifter and console, axle stamp and carrier, cooling, exhaust, dates, and records · 1981 Chevrolet Camaro Z28

Cars With This Authenticity Marker

3 linked car pages.

Sources & Documentation