You can make a small spacer. I've seen 1/2" bolts, 7/16" id iron pipe, a stack of washers, whatever takes up the space between the rear leg and the block lug.
Yes, you can use washers......Here is a pic of a mount using this method. :coffee2: Oppsssss...cannot add pic, too large of file. email me if you want to see it. Sorry guys