I've got a 1974 GMC Sprint project car. It was originally a 350 small-block Chevy with a TH350 trans, but I sold the engine and trans and installed a 454 [big-block] and TH400 trans in it.
On one of our recent projects we pulled that proverbial thread-the one that unravels the whole blanket, or, in this case, our whole project. In the words of Ricky Ricardo, "Let us splain." You may ...