The newer Denso alternator is a popular swap. It comes in 90 and 120 amp versions, and has better idle/low speed charging characteristics. If you request an early D150 application, it should come with a standard, double-groove pulley (not the serpentine belt pulley) and work with the regular voltage regulator setup. The D150 version has two studs for the voltage regulator wiring. You can cut off the female spade terminals on your harness, add ring terminals, and you're good to go.

If you haven't done so already, I HIGHLY recommend putting your fuel pump, electric fans, etc on relays with separate power leads. I would also run a "charge" wire from the alternator to the positive terminal on the starter relay on the firewall. This will remove a big portion of the load from the factory harness/fuse block. The weak links in the older mopar electrical systems are the bulkhead and amp meter.

If you do a search on this board about headlight relays and denso alternators, you should find a lot of good information.