i made the homemade plate out of aluminum, a piece of gasket paper and a little rtv sealant, but if you use thin aluminum (piece of a road sign) like i did, you may have to cut the bolts a little to get them to tighten down, or a couple washers, mine were bottoming out before they got tight, and definately dont forget to block the tube on the carb, i used a screw and a little rtv