Re: Numbers Matching
If you have a date-realistic engine with the correct casting, that's as close as you can get. But consider my 1970 396 TH400 truck: the engine is coded to 1970 396 automatic truck, so it's a pretty safe bet that it's the original. But you can't prove it authoritatively, even with GM of Canada documentation.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought
1969 Pontiac 2+2 427/390 4-speed Coupe
1969 Pontiac 2+2 427/390 4-speed Convertible
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