Hi guys,
Pardon my ignorance, but I'm going to be shopping around for a rebuilt 350 for my '71 GMC 3/4T 4wd.
How can I tell if it is a 2-bolt vs. a 4-bolt main? It isn't original, has 6 studs holding exhaust manifold, dipstick on drivers side (if that makes any difference???) Thanks,
Ray
