SM Head Modifications on a budget

pittsburghracer said
The exhaust side is so easy to make some fast unbelievable gains. Maybe not so much in flow but performance. 220 cfm on that side is probably a good job. One of these days I’m going to grab a head and just give in a nice performance valve job for a 2.02 valve, 30 degree backcut, 15 degree chamber cut, and spend a fair amount of time on the short side. Then do up the pinch and bolt bulge. I won’t touch the roof or floor except to blend the work I do on the short side.

Here’s how I remember my test looking for the easy stuff.
Valve job, back cut, blend bowl & SSR = low 260’s.
Open pinch - basically no gain
Smooth bolt bulge - basically no gain

I’d love to see how it worked out for you.

With what I did the SSR was still an issue, so making improvements upstream weren’t paying off without more of “something else” getting done.