Thread: bb id

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i have aquired a 396 bb ithink the block numbers are 3955272 and the heads are numbered 3919840 the block is stamped high perfofmance above the oil filter and the heads are to any info would be helpful thanks gene

Block is 68-69 light truck. source : http://www.ajgeneral.com/bbc_block_casting_numbers/

Heads 3919840 1967-69 396/427 Closed 107 375 L-78 425, 435 L-71/L-72, 425 COPO

source:
http://www.minuit10.net/EngineCode/c...linderHead.htm

check sources there is overlap in applications .................

kitz

Casting number 3955272 was used in 1969 for 396 and 402 blocks in two and four bolt. Horsepower ratings were 325, 350, and 375.

3919840 heads were used on 396 (and 402) as well as 427 between 1965 and 1969. They are closed chamber heads and have small combustion chamber volumes for high compression ratios, with even mildly domed pistons.