when i bough this truck i wasnt sure which way to go with it , i hang on the other dark site because we aremostly into older rods but i wanted something a little different so after picking some brains and a lot of reading i started with taking a running truck further apart to hopefully end up with soething more fun to drive , head, done b cam in the mail , Bubba Gmc dist ordered , old stromberg downdraft and carb all set to go
Head back from machining
- Thread starter rcranger
- Start date
Purdy Swoft
Well-known member
Is that a C head??
rollingsculpture
Senior Member
what about the lack of recess area for the cylinder top in the head?
Marco Tahtaras
Well-known member
Are you running special pistons? Model A pistons (and most replacements) protrude approximately .031". The Felpro gasket should take you down to about .020" assuming the block hasn't been decked.
You might tap around with a hammer on the formerly recessed area and listen for the sound. Your C head may have a relatively thin casting in that area and .125 inches off takes you deeper than the stock recess. I saw one like yours that held up for only a few days before a quarter-sized hunk fell out, punched a hole in the piston, and caused other collateral damage. I was amazed at how thin the casting was in that area.