Headers and brake lines

One thing I can say abou the Dougs headers: They put the tubes really close to the brake lines. Whoever designed them did a great job finding places for the tubes to run but it puts them whithin 1/4" of the brake lines and prop valve. I will wrap them where I can, but I was going to try the Wilwood high temp brake fluid also. Any one had any luck using the high boiling point fluid in systems that are close to headers? I have had no experience with hyd brakes and heat, and I don't have any more room to move the lines more than I already have.