[Steeveedee]

I don't recall what the setup looks like, but when I put headers on the 305 SBC I had in my '68 Skylark, I used a 1/2" pipe nipple with a washer to space the bracket out, as the header flange was thinner than the manifold. The engine had tapped holes in the head, but I don't recall if I used them. Let's see a picture of what you have. Someone will certainly have a solution.