[wfot]

caliper says 41.5mm across the thickest part of the head

I also have one of bill's 12mm studded blocks, 12mm studs on all mains very nice work indeed. The thing is a tank. I hear good things about him as well. I think that was kurt's actual 415 block as well. From what I read, Kurt was going all out with that build and Bill did the work. It does look good. the heads are very nicely done. But I do not have any other LT5 heads to compare them to. Might do some bowl work and match the ports a little, but they are pretty much ready to go

and yes 4.00 x 4.00 motor, bryant crank.. work of art

I am planning on 12 to 1, but if head gasket selection can get me to 12.25:1 or 12.5:1 I would do that a well