Early Abody Doug’s 450 header install BEFORE engine going in

AJ, those early A headers have slip joints and flanges.

I think you'll be fine putting them together laying them in, just like you would manifolds. As long as the steering column and torsion bars are out/slid back.

AJ, here's a pic when I was painting mine. Which lasted about 10 minutes. I wrapped them after that.

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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