[CJM72]

After examining the problem, I think I should rephrase the question here. What do you guys feel is a minimum amount of clearance between a driver's side header and the firewall? When the engine torques (twists) the driver's side header is going to rise into the firewall. New mounts might give me an 1/8" of clearance, but I'm guessing that I need 3/4" to be comfortable. The offending section of the firewall has some bends and ribbing built in that might not be great to beat in.

I'd love to use these headers and sell my LS3 manifolds, but If I can't figure out a fix soon I'll have to throw these up for sale and try to get my manifolds coated instead. Thanks