Shim it however you much you need to to gain the clearance you want. I ended up giving mine 1/8" on one side and 1/4" on the other. You can level the engine by moving it side to side in the saddles if you so desire. Get it where you want it and snug the bolts down. As said, if you have some scrap laying around, make you own. I used 1/8" aluminum plate- super easy.