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Looking for info on removing the heat riser from my right-side 340 HP manifold. The more I play with it the more I feel like I'm going to break something and the flapper is going to be a permanent resident in the down tube... There is plenty of advice on buying a replacement heat riser...

Are factory 318 Exhaust Manifold Primaries 1 5/8"? Or smaller? Also, who has had their Exhaust Manifolds Extrude Honed? I was checking prices at a couple places and it looks like $600+ is where I would stand I want to make my own headers, but I am finding it to be a PITA (anyone who's tried...

Hey guys, I am curious whether any of you have used the C-Body log-style (non-HP) manifolds in your big block A-Bodies. I know I will have to eliminate the sleeve on my steering column. From what I have HEARD, these C-Body exhaust manifolds work great, but that is hearsay. I understand that...