Doesn't it just PISS you OFF when you spend a lot of time doing a class A job even if with spray cans only for it to burn off that quick? The headers on the 400 I just got running in Gladys did the same thing. And it wasn't because I had the timing retarded, either. Soon as it fired, I pulled 36 degrees in at 3000 RPM. Dammit I was MAD. lol