Re: Compression ratio of 327 head; year of the engine block?

Posted by flyntgr On 2016/9/1 23:22:42

EDIT: My M6XXXX engine is correct for 1954 (a 359cid), but I still don't know what 327 head I have. See below:

I checked the 327 cast iron head near the thermostat and believe the numbers stamped there are "35 5". Does that look like a head or date (May, 1935?) number to anyone? I'm trying to find out which head is on it because the 327 heads were not the same compression ratio each and every year; they varied as to CR.

The car was parked for a long time in an airplane hanger and has now been cranked and has run for about an hour. It smokes enough to kill swamp mosquitoes in Louisiana, but hopefully the smoking may stop after it has been run awhile without Marvel Mystery oil poured into it. It is pretty smooth running considering one of the pistons has not found compression yet. We're trying to baby it until it wakes up.