Quote:
Originally Posted by shp4man
My truck's engine is, from the casting numbers, a 69 or 70 250. It's head mounted studs are the same thread size on both sides, but I'm not sure you have anything to worry about there.
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It seems pretty weird to me that one side would be 3/8-16and the other would be 3/8-24. Like those aren't the original studs and someone replaced them with USS/SAE studs. But, fine threads should be fine for this application, so I think I'm just going to run with them.
Regarding one of my earlier questions about exhaust pipe studs, from my picture above I counted the threads, and it looks like there are about 24 threads at 16 threads per inch, so those studs are 1.5" on the pipe side. Looks like they have about half an inch to thread into the manifold, so 2" overall should just about do it.