Gone and done it,,,,,my Brother in CA picked up a 91 Burb with a ,,,,,GAS engine. Probably going to ship. I,ve been reading lots on this site and another. Going to make a list. And a bunch of Q. for you all. Found a site that has new blocks and was a little shocked at the prices. Swapping doesn't bother me. Burb has no rust and has needs,,, of course.