I tried the Keisler perfect fit 5sp guess what I would have to cut my floor and would still have driveline angle issues. Their solution add spacers between the k-frame and frame rails or cut the torsion bar mount. Ya right on an AAR. Fortunately I got my money back on that one. Next up the Passons OD bolts up fine ratios work well with my 3.91s. Now the catch it sounds like an old truck loosing its bearings. Passons couldn't fix it. The designer couldn't even fix it although he tried harder than Passons This whole project has been years of the car setting My trans has more travel miles than my car has since the resto . Now I have some money in this trans project and no results. Gear vendors might be great but more money. It might be time to cut the losses and go with something the works