I used the trans dapt 1" setback plates and the only thing that needed to be done was grind them in certain areas for clearance. When you get them and try to fit them to the block you will see what I mean. You used the original truck clamshells but cut out the middle section because it doesnt sit flat with it there and also I had to cut down the bolts that mount the clamshell to the plate or it would bottom out before it tightened and you dont have to used the nuts that it comes with. I put them on and dropped the engine in like it was meant to be there no prybar to make it fit nothin the long bolts slid right in