Alternator questions

By the looks of your setup you already have the brackets to remount a Mopar alternator to your motor. You need the upper mount which is the triangle piece in your picture, and also the lower swing arm adjusting bracket for the belt tensioning. It looks like you already have that too. It would be the wiring aspect of your setup which would need to be addressed. The stock wiring on a 64 needs to have the power line wired into the harness, which they may have spliced into under that wiring sheath, and it also needs a single field wire that goes to the voltage regulator that is mounted to the firewall. I believe GM alternators have the voltage regulator built into the unit, so they may have bypassed that aspect of your system, a better picture of the firewall and another of the wiring unsheathed to see where it goes would help solve this. Snap a couple more pics and we'll see if we can unravel this mystery!!! Geof