[benoit454]

I've ran the same dynomax black jack style full length headers on 2 trucks, never had a problem. I had them on a 76 c10 with a 350 and now on the 86 k10 with a 305. No problems, not very tight to the starter, I can take the header off or put it on as I did with start and wires in place, I can get my hand between the starter and header, and it's not anywhere close to fuel lines either. I had the bolted to the pipes on the old 76 once with no gaskets and it didn't leak a bit, they only leak on the 86 at the collector because of a incorrect bend in the pipe behind the header collector, and because I had that piece and another made to connect the collector to the exhuast, bends up then flat on the pass. side, and the driver's is just a reducer but clamped in place, and leaks where the clamps are. If the exhuast was welded up and correctly bent there would be no leaks. Also for collectors or on the block there are many types of gaskets now to help stop being burnt or blown out, or leaking, like copper, dead soft aluminum, fiber type, paper covered aluminum, all sorts.