the bell housing on this truck is E3TA 7505FA which has a ball stud in it. the 7515 clutch fork (which is what I have ) shows as correct on the diagrams provided on this web site(the bullnose bible). of course my fork has a broken retaining spring and neither fork nor spring can be found. I guess they mixed and matched some. as I understand the 84s and up went with a hydraulic clutch. if parts can be found, it may be worth the swap. If not I will save engine for another application and scrap the truck