I'm looking at an engine for sale and the heads code listed is 1382546. Gessler says they are for a 68 and Buicks.net says a 71 engine. So which is it? While I'm here the block number is 1241748 with a C-4 stamping. My research shows that to be a 72 block. Can anyone confirm this? And finally, the crank number listed is 1235419. Shall I assume this is to the 72 block?
