Hi, I'm planning on getting a set of used 340 exhaust manifolds for my 1970 Challenger and using Accurate Exhaust's factory exact exhaust system. The casting numbers would be left #2863553 and right #2863549. I've seen a couple of pairs for sale. One with quite a bit of pitting and one with the heat riser welded shut. If I'm allowed to ask, what would be a fair price for a pair in pretty good to good shape, all original with the heat valves still in place? There was a company making...
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