SM Head Modifications on a budget

pittsburghracer said
My pinch on the first head after tubing is 1.015

View attachment 1716265192

View attachment 1716265193

What port height do you get out of them ?

Earlie A posted stock pinch height as 2.08"

2.08" x 0.95" = 1.98"

1.98" x 1,100,000 / cid = rpm, 367 = 5,935 rpm, 408 = 5,338 rpm

2.08" x 1.015" = 2.11"

367 = 6,324 rpm, 408 = 5,689 rpm