I have a 69 mach1. It originally had 351 I took that out and converted it into a 429 cobra jet with a c-6 instead of a c-4. The only headers that I could find where from crites restorations they make a custom set of headers. the engine takes up every inch of space in the engine compartment. I have power brakes and the back header on the drivers side sweeps under the brake booster and the booster can't go in straight there is about 3/4 of an inch between the bottom the booster and the fire wall it can't seat in all the way and I can't get a full brake pedal. Anyone have any ideas or should I just convert it to manual brakes. I can take a picture if anyone thinks that would help them think of something. If anyone else has made this convertion how did you get a full brake pedal.