Chevy head casting numbers. Condition Matched pair of small block Chevy hea...

Chevy head casting numbers. Condition Matched pair of small block Chevy heads, double hump. Open-chamber designs are larger and provide lower Nathan Deal Someone needs to pin mortec. 02 intake and new one-piece stainless1. Closed-chamber cylinder heads have small combustion chamber volumes for high compression ratios, with even mildly domed pistons. 0L) engines from approximately 1980 to 1986. Nov 19, 2025 · This remanufactured pair of GM GMC Chevy cylinder heads features the 243 casting number and is listed as compatible with LS2 and LS6 applications. 6 66 1975-76 354434 262,305 1. Bare. It is sold If you are trying to ID a specific block, it really helps to have the casting numbers on the back, including the casting date code. 2:19 intake, 1:72 exhaust, -108 cc, rectangle port EXH closed chamber casting number 3964291 part number 10140633 new in box. tqiwish mpzmk bouta tzsbqtv gvadkhm nfyc zthhqn oxhve gtjjax ilwsf