is a bigger alternator indicated?

I think it would be a smart move. You could probably get by with what you have, but more juice would be nice. Lots of people are swapping to the late model 3G alternators, you may want to check into that. Also, there are some hi amp GM 1 wire units available.

If you wanna do the GM 1 wire here's some info

Converting Your Ford GM Juice

# 1. Take the old alternator and regulator out.
# 2. Get the 94 amp 12si alternator out of an 84 Camero
# 3. Reclock the back of the alternator so the 2 prong plug is facing the right side of the engine compartment.

IMPORTANT make sure that when you take the 4 bolts out of the back of the alternator that you lift up on the case only enough to get it to spin!! Lifting it up any more than about 1/4 of an inch will result in the springs coming out of the contacts (this is a bitch to get back together) Re install the 4 bolts.

# 4. Get a 5/16 drill bit and drill out the mounting bolt hole to accomodate your original starter mount bolt.

IMPORTANT cover all of the openings of the alternator with tape so that the shavings dont get inside the alternator.

# 5. Make a new shim for the mounting bolt (will need to be longer than the original shim)
# 6. Connect a jumper wire (16 gauge) from pin 2 of the modular plug to the main post "BATT".
# 7. Connect the main post to the + side of the battery.



I used the original charge wire that was hanging out of the harness. Now that Green wire with the red stripe that used to go to the voltage regulator is a perfect +12V hot key on source for the duraspark mod and the fan relays!!.

Go grab a 140 1 wire power master alt.

Ive had mine working a 1200 watt stereo system for over year and a half

def. powermaster! great alternator..one wire hookup

yes you do need to upgrade the alternator like the others said, and you will need a minimum of 130 amp output.