The difference in area between .904 and .905, 16 times, is .02272sq/in.

This is equal to about one .170" diameter hole(.02269sq/in).

That's a pretty big leak.

Quote:
I don't get the sense this is a high end build. Measuring stuff could be an option too. Silly right


Measure???
What a novel idea!!


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads