Irv,
That does sound like a tight fit. My headers (Triumphtune) had a pretty
snug fit too. As far as the securing nut problem, this is what I did. I
removed the studs from the head that had the clearance problem. I then
found some internal wrenching bolts at a automotive hardware supply
store. These were the same grade or better and use an allen wrench to
install. I cut an allen wrench to the length I needed and used my 3/8
drive ratchet and socket to tighten the bolts down with no trouble at
all. Use high temp anti-seize on the threads.
Might be the solution to your problem.
Pat in NC
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