How can I tell a 265 Power pack V8 from standard 265 V8 Engine

Asked by GuruFF3FP May 04, 2020 at 09:18 PM about the 1955 Chevrolet Bel Air Hardtop Sport Coupe RWD

Question type: General

lookin to buy a 1955 Belair. I'm being told it has a power pack 265. with- out taking the motor a part how can I tell ? I have a head # of 3703523, it does have dual exhaust and a 4 barrel carb. I also have an engine # of 029973F55GR other information ??   

1 Answer


The Power Pack option in 1955 had the same heads as the standard 2bbl 265. The peaked “triangle” power pack heads didn’t appear until 1957. A 55 Chevy with original 265 power pack is uncommon but not rare enough to be 100k (depending on model body style and caliber of restoration) and equally hard to prove since there isn’t much identification in the numbers. Date coding all parts would be a clue but that also leaves chance of change. The only way to really know is original bill of sale with the options listed. I own a 55 with original 265 Power Pack which I race in stock class. Has Corvette style solid lifters and same small port heads as the standard 265 of that year.

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