Quote Originally Posted by IC2 View Post
... Those Ford exhaust gaskets - none, regardless of brand are a very good fit except those expensive Earl's - or so I found out when I used the GT40 heads on the '31
Amen, brother!! And as I have learned, some of the aftermarket aluminum heads take some liberties with their castings, making sealing things up a bit of a challenge sometimes. If you're going to spend valuable time making flanges from scratch I would make them to exactly match the heads you are holding, not to match somebody's dimension drawing. At the very least you need to verify every dimension against your heads, IMO.