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Authenticity reference

Transmission evidence

numbers matching · documented

1966 Chevrolet Chevelle SS396 sports coupe; exact-year SS396 exterior context, not individual L78 proof. 1966 Chevrolet Chevelle SS 396 L78

Reference Details

Common issue
Assuming all L78 cars used the same 4-speed transmission without car-level proof. · 1966 Chevrolet Chevelle SS 396 L78
Confidence
documented · 1966 Chevrolet Chevelle SS 396 L78
Correct value
M21 close-ratio 4-speed support when claiming that transmission with L78 · 1966 Chevrolet Chevelle SS 396 L78
Where to check
Transmission stamp/tag evidence, paperwork, and build documentation · 1966 Chevrolet Chevelle SS 396 L78
Common issue
Four-speed and automatic conversions are common in high-value restored Camaros. · 1969 Chevrolet Camaro Baldwin-Motion Phase III 427
Confidence
reported · 1969 Chevrolet Camaro Baldwin-Motion Phase III 427
Correct value
Four-speed or automatic claims should match car-specific documentation and transmission stamp/case evidence. · 1969 Chevrolet Camaro Baldwin-Motion Phase III 427
Where to check
Transmission stamping/case, shifter equipment, invoices, and restoration records · 1969 Chevrolet Camaro Baldwin-Motion Phase III 427
Common issue
Four-speed and automatic conversions are common in high-value restored Chevelles. · 1969 Chevrolet Chevelle Baldwin-Motion Phase III 427
Confidence
reported · 1969 Chevrolet Chevelle Baldwin-Motion Phase III 427
Correct value
Automatic/TH400 or other transmission claims should match build sheet, Protect-O-Plate, case/stamp evidence, and Motion paperwork. · 1969 Chevrolet Chevelle Baldwin-Motion Phase III 427
Where to check
Transmission case/stamps, shifter/console equipment, build sheet, Protect-O-Plate, invoices · 1969 Chevrolet Chevelle Baldwin-Motion Phase III 427
Common issue
Four-speed conversions are common and can erase an original automatic evidence trail. · 1970 Chevrolet Nova Yenko Deuce LT-1
Confidence
reported · 1970 Chevrolet Nova Yenko Deuce LT-1
Correct value
Manual or automatic transmission claims should match the car-specific Yenko/COPO documents and stampings. · 1970 Chevrolet Nova Yenko Deuce LT-1
Where to check
Transmission case/stamping, shifter equipment, build paperwork, and restoration records · 1970 Chevrolet Nova Yenko Deuce LT-1

Cars With This Authenticity Marker

4 linked car pages.

Sources & Documentation