Welcome 64SS. I am going to use the stock vette alternator/power steering bracket that moves the alternator high on the drivers side and may work for you. I am not running air but there are others that will join in and give you some options on a high passenger side bracket for a/c. If you don't run air, I can get you the part off of my idler pulley for the pass-side. If you have an F-body motor, you will need to change the crank pulley to the vette version (used about $35). The vette accessory belt runs closer to the motor so all pulleys and accessories need to line up vette style.
I have a picture of the alt/ps bracket on a motor but it is too large to post. If you give me a email address, I will send the pic.
Good luck. Steve