For a 80 I would definitely use the 1HDT , I have a H151 5speed listed for sale right now in the classifieds here .Hey I’m looking to do a 1hz or 1hd-t swap on my 80, I’m in the Dfw area, long shot but do you know anyone they would be willing to give me a look around their rig? Which would you recommend? I know we spoke above about the 1hd-t being a lot better, and I’m planning about matching that with a 5speed with overdrive regear.