So the slave cylinder is for a 68 D-100 truck, and the bellhousing is off of the polyblock engine that I got with the truck. The bellhousing and tranny are definitely are 68 or older. I realize this probably the best forum for this, but like Dano said, I'm sure there are some very savvy people on here and hoping someone can help out. If not I understand. The fork did fall off it's pivot inside the bellhousing once. I had to use the field expedient method to fix it. Although my fix is pretty solid, I would like to fix it properly. I can open the inspection cover and take more pics if needed. Thanks