I rebuilt my 69 350 a few months ago.
I posished the combustion chambers.
Cleaned up the exhaust real good nice and smooth.
Cleaned up the intake, but did not gasket match them,
i was told it wouldn't make a noticable difference.
and that being the hardest part of the job i pass on it.
now that i'm running it at a 1/8th mile and trying to find 1/100 of a second, i'm thinking i should have matched the intakes.
question being should i pull em and do a gasket match.
also what else can i do to that head to make it better.
yes that's the A/C compressor-