Okay, here it goes... I have access (was given, so the price is right) an 80s GMC truck and not sure what the size is (C7000 to C9000 I’m guessing) but it has a Detroit Diesel in it with a God only knows how many speed trans. I’m guessing the engine is either a 6V53 or a 6V71, naturally aspirated . The truck is a cement truck and hasn’t been driven in probably two years but drove fine when parked. I drove it in the mid 90s and it drove great. It belongs to my father and he got out of the cement business a year and a half ago and it’s just sitting there. Anyway, I’m contemplating transplanting engine and trans into my 1 Ton Chevy (wouldn't it be a BEAST!?!). Hopefully, it’s the 6V53 which, even though heavy, is a bit lighter. I’ve seen a few done on diesel-central.com, but right now, I’m looking for references and information. Anyone have a good Detroit Diesel website or anything with repowering? Comments and opinions are appreciated. Thanks for the help.