From what I'm seeing it looks like your front cap is 2 bolt, and the rest are four.actually come to think of it...I wonder if I have 4 bolt mains all the way down. My uncle's chevy 454 that he and I are rebuilding from a 1-ton dually has them all the ways down the crank. It'd be awesome if I did.
Look in the glove box, it will have a list of every part put on the truck at the factory.its a 93 sorry.
I am still not sure as to what the tranny is, I thought it was a 4L60-E but I am not sure.