Personally, I like the Chevy's. Hard to beat a good 350, and even though in 88, they were still a bit under powered, it should tow fine. I think that tranny is an HM290. I know that's what they used in the 1500's and I don't recall GM using two different manuals in those years. It's kind of an odd tranny with the bellhousing cast into the case. We have one in my dad's 88 C1500 and pull his 28' camper with it. It has held up OK, even though they weren't well known for their toughness. I know they can chew up synchro's real fast if used hard. Might need to find an NV4500 down the road.