frogfarmer - Your engine number decides as:

0627939 = Unit Serial Number for the year of manufacture (beginning at 1001)

F = Built at the Flint plant

54 = Model year 1954

Y = Passenger Car 235 originally assembled with a Powerglide automatic transmission

The “Powerglide” 235’s were equipped standard with a hydraulic cam and lifters, where all other 235’s were built with solid cam & lifters. Detailed specifications for the passenger car “Powerglide” 235 engines can be found in the “engine specifications” section of the 1954 Chevrolet Data PDF.

~ Dan
1951 Chevy 3 window 3100
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1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)