if your working on your 37 there is really no need for a stud welder as you can get behind every panle with a spoon or pry bar or pick rods.dolys . i used all the studs welder s out there in the last 30 years every shop i worked at had one a some spot welders that stuck washer up and you hooked them with a puller not shure if i used the HF one .you could see if any of the tool guys have one used on the truck snap-on mac pawshops .E bay .craigs list