headers on 1970 c10

[the-parts-guy]

Im having some problems with header clearance. On a frame up restoration, I put in a new ZZ4 (350) Chev crate engine with a T350 tranny and am having some problems with clearance between the headers and the frame, and between the headers and the spark plug boots. I have tried a set of Hookers and a set of Heddmans. (I can get part numbers if needed) The Hooker headers seemed to fit better than the Heddmans, but still do not fit right. I would have to notch out a section on the frame so they do not rub, and also have to modify the plug wire routing. I am just wondering if anyone else has had these problems and what was done to fix them.