Headers for a big block a body?

I have a 68 Dart with 383, schumacher /6-BB mounts, and 4-speed. The TTI's were a night mare to clear 4 speed setup. Had to butcher z-bar!!! I do not recomend them for 4 speed cars. May work great for auto cars, but not with 4-speed!!! Just my 2 bits... been there and done it!!