I am amazed at how little there is available on this topic. My most basic question is this: How was the exhaust pipe to manifold transition done originally? My research says that to begin with, the pipe is 1 7/8" in diameter. However, most after market stuff seems to be 2". So right away, we have an issue. Second, there are two types of gaskets. One is flat and in the shape of the two hole flange. The other, and I understand the correct one, is a "donut". What no one has been able to tell me is if one uses a donut as I understand was original (and hard to get) do you have to flare the end of the pipe? The replies I get talk around the question but don't answer it. How, in fact is this union done? Straight pipe, donut around pipe, whole shebang held in place by flange no flare required? Pipe flared, donut in pipe and then mated to manifold all held in place by flange? Pipe flared, donut around pipe pipe flare held in manifold and gasketed by donut held in place by flange? Anyone have the REAL answer?
Thanks,
Roy
