318 help..

Yes, he's loosing compression with those heads...

However the increased flow is offsetting some of that...

But if he puts in 10.5 pistons like I recommended above, it will be at 9.2 with the 360 heads...

That way he doesn't have to mill the crap out of the heads to get the compression and then have to use custom fit push rods/adjustable rocker arms, and deal with milling the intake to fit...