Obviosly a junk yard would be a good start, but if your not in a hurry and want to improve things a little....MSD makes one and it comes with a stud that you thread into the block, instead of the regular bolt.
When you're reaching around trying put the bolt through the clamp and into its hole, its kind of a pain to get it to line up when you can't see, with a stud it would be easy!
When you're reaching around trying put the bolt through the clamp and into its hole, its kind of a pain to get it to line up when you can't see, with a stud it would be easy!