473478 427 1977-1990 Four-bolt (tall-deck) 1014183 366 1991-1992 Four-bolt (tall-deck) 3855961 396 325 and 360 1966 Two-bolt 3855962 396 360, 375, and 425 1965-1066 Two-bolt or four-bolt 3869942 427 390 and 425 1966 Two-bolt or four-bolt 3873858 396 375 1966 Four-bolt 3902406 39...
This was head casting number 14092359 and was off of an '87 tall deck 427 truck motor.\ "CONV" is just a foundry mark and is NOT an indicator that the motor was originally installed in a convertible. "CFD" is an abbreviation for the CENTRAL FOUNDRY DIVISION. ...
Early 396 big blocks from Chevy had a tall deck design that was 0.4” bigger than the standard decks. Typically, these engines produce massive amounts of torque stock, but top end power is lacking unless upgrades are made to improve flow. However, Chevy put the standard decks in almost all...