Thread: 302 cyl head print (needed!)

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We seem to have a basic mis-communication here, or at least I am very confused. This flange is a part of the header, and it bolts to the machined head surface with the eight header bolts adjacent to each exhaust port, into the 3/8x16 threaded holes in the head. Your "custom flared pipes" weld directly into the oblong holes in the header flange, unless you buy flanges that already have stubouts - then your primary pipes weld to the stubs instead.

The only thing I could see that might be different is if you have a set of the SVO oval port heads, which have the bolt holes at an angle because there's not enough meat at the sides. If you have those heads then your header flanges are drilled in that pattern vs the straight line shown in the drawing Louey posted. Picture of the SVO is attached. Is this what you have??

Dang - all you needed was a piece of poster paper from Wally World (35 cents) and a ball pein hammer that has a good rounded head - and made the same way you make that water outlet or differential gasket at 9:00 PM on a Saturday night. 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

Originally Posted by IC2

... 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.