Gotcha on the 848 head, I've read that the 848 head gives higher compression and better exhaust note.

My current 235 block is 57 and the head is a 54/55 standard 235 head.
I am just looking to update the exhaust this winter.


1951 Chevy 3100 1/2 ton (1957 235, 4 speed, 411 rear)