“302” head question

I am porting/ polishing my exhaust ports on my 302 heads. I have done a couple of 915 heads and a slant head. My question is on the exhaust seat.These heads seem to be a little different than the others in the exhaust seat itself. I hope I can explain this correctly. The seat insert overhangs the bowl wall. Is this normal for these heads? If this is not clear enough I'll try to draw a picture of it. Thanks...............
Author: admin