if you use a 10si or 12si, you can ditch the external regulator and it's wiring and really clean up your engine bay.

10si and 12si have the flat, 2 pin blade connector on the side of the housing. Go buy a core at the pick-a-part and save having to pay a $30 core charge when buying one.

The alternator sould bolt right in. Hack the connector and looped wire when you get the one from the 'yard. The charge wire goes to the cable lug on the starter solenoid or to the battery, if you like. The looped wire on the plug goes to the charge lug on the alternator, and the other small wire gets keyed power through the idiot light bulb in the dash.

Wire in a volt gauge to any keyed, 12V source under the dash. DO NOT use an ammeter of any kind. Gauge fails=no charge, not to mention having another 10 feet of wire for your charging system to have to fight through (can you say "voltage drop"?).

One-wire alternators SUCK, because most parts stores don't carry them, and when your car breaks in BFE you will be SOL!