Painless Harness in 70 Mustang with 3G alternator?

Hello again,

My Mach 1 was in a fire, and I previously posted that I was going to try to make a serpentine system work with my 351.

I got a complete junkyard 5.0 setup, and a four-eye water pump, and all I had to do was frabricate a small bracket to stretch from the water pump holes to the right accessory mounting setup with the 351's taller deck height. Ford sells a .950" crank pulley spacer, so I have the setup ready to go on with serpentine.

At the time, however, I am going to a taurus electric fan. So I really need a higher output alternator. I want to use a 3G since it should be an easy bolt-in with the 5.0 bracket.

Here is my problem:


http://g.imageshack.us/img100/painlessmd5.jpg/1/

The Painless Wiring Harness (my original harness burned up) calls for the power to the internal fuse block to be run off the alternator...

Isn't the 3G alternator a 1-wire unit? Does it only have 1 post on the back? How would I make this setup work?

Also how would I setup the ignition switch? On the 70 it runs through the voltage regulator.

Is there someway to just use the 3G with a voltage regulator?

Thanks

I found this guide



I guess that information will be largely the same for modifying the Painless harness?

It looks like the major difference is on the Painless harness the B+ terminal goes to the interior of the car to the fuse block, then comes back out to go to the starter solenoid, whereas on the OEM harness the B+ goes to the starter solenoid terminal and the fuse block gets its power from somewhere else?

Is there a place to buy just the OEM engine bay wiring harness? The Painless seems like kind of a pain (haha) with regards to having to replace the entire cabin and trunk harness to make it all work.