Photos and diagrams of Chevy casting number locations for blocks and heads for big block and small block V8 engines.
Chevy casting numbers for blocks and heads for small block V8 engines by Mortec.
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Nov 14, 2009 · I just ran a search on the head casting numbers on the 350 in the ’71. They are 3973487. Which engines were these heads used on? This is the only …