Best alternator option?

I've finally gotten around to cleaning up some wiring from the PO and traced an oddly spliced wire all the way back to the choke. Turns out my alternator wiring isn't completely working so the PO jerryrigged it.

I'm going to go ahead and replace/upgrade the alternator instead of trying to futz with the odd one that is in there. Any suggestions on the best alternator to convert to for a carb'ed 351 W? I wouldn't mind having a little extra current to work with but I'm not looking to do anything radical.

Thanks