I joined here a long time ago and the project I was asking about did not work out, but now I'm in the middle of a project (1959 Buick) and I find myself needing some guidance. My air lines in the engine compartment will get quite close to my exhaust manifolds. I don't want my plastic airlines to melt so I've been trying to fit some copper lines to get me out of the engine compartment. Problem is I've been having trouble getting a good seal and I just don't trust them in the long run for fear of cracking or the flange loosening up with vibration or heating/cooling cycles. Does anyone have suggestions on how I should handle this? Steal lines? (didn't want to use steel for fear of rust) Hydrolic lines? Are there any that could take the heat? Any other ideas?