Former owner of Shadofax
it's not an upgrade unless you do all cables related to the charge circuit. otherwise, IF you had a high draw situation (like a winch or something) just because you have a good 2 GA charge cable, the ground may not be adequate. So in addition to the above, you should also just go ahead and:I went ahead and took out the alternator from my buddies 93 F150 project and put it in mine for a temporary solution. It seems to have solved the problem on the ride home (8 miles) and pulled a consistent 13.7v. Im going to order a 160a 3G (direct swap in late models) along with some Mil-spec terminals and the 2g recharge cable from Ryan's (Fireguy50) website. It should be good maintenance as well as a nice upgrade.
1) you need the buss fuse appropriate to the alternator capacity since you'll be doing away with the fusible link in the stock charge cable.
2) this means you actually need:
--cable from alternator to buss fuse
-- short cable from fuse to fender relay (this is the way I did it)
--short cable from fender relay to batt +
Then you need
--black neg. cable from batt neg to fender (recommended)
-- black neg. cable from batt neg to frame and block.
I added some of my pics, I think, to the 3g swap thread. Im not actually digging the mil-spec terminals, would be neater if I had used marine terminal with a little wingnut.