Update, I went ahead and got the Holly Compressor mount that fits on the lower passenger side Part # HLY-20-159 this bracket is specific to the SD7 compressor that comes with the vintage air kit and I purchased the Holly accessory belt tensioner part # HLY-97-156. With this combination I had to do some playing around with belt sizes but ended up with a Duralast 370K4 belt. I went out and beat on the car and the belt stayed on!!! Oh, one last thing, I have a LS7 for my engine, the combination above will work for all LS blocks I believe and it has different settings that come in the kit which allows you to run off the 4 rib accessory pulley or the main 6 rib pulley. I ran mine on the 4 rib accessory pulley. I hope this helps someone.