TMM,
Can you tell me what is the actual cubic inches of your engine after the rebuild? Also, what carburetor are you using and what cfm is it?
Thanks for this build thread.
I am considering a rebuild on my '65 273 with '68 heads and a cast iron 4 barrel I.M..
Richard
277.8 is a +.030 over. I tried to save my original carb but ended up using a 600 cfm Edelbrock. I believe the 68 heads are low compression/ open chambered heads. What number heads are you thing on using?