I use a 130amp denso alt of an 02 one ton ram van. bolts right in, it's externally regulated so you can use your stock reg. cheap on ebay if you can settle for a bit less amps. I see them a lot for 30-100 bucks. as said before, upgrade wiring. not a huge deal. I ran a 4g wire from the alt to the starter relay. I have since added extra fuseblock and relays for lights, fans, electric fuel pump. I got all my power for the relays from the starter relay where I ran that 4g wire.