If your asking about fitment my I'm using my 1983 tensioner pulley on my fuel injected 88. Also the 88 tensioner fits on my 1983, they look a little different. The only real difference is the 88 has a bolt that runs through the center where you bolt it to the bracket and the 83 doesn't it just has a permanent stud that's attached to the back of the tensioner. But they fit either model, if this helps in any way.