Updating alt?

Ron Morris Performance (www.ronmorrisperformance.com) makes a harness that adapts the later alternator into early cars. I have one, and it went in easily and works well.

Go to the site, click on "online store" then "wiring harnesses".

aint it nice when it all just snaps togetrher !!!!

Or you could forgo the extra wiring for the 91 alt and do the 3G swap from a 94/95 stang. Only one wire to be connected (red/grn) to the new regulator on the alt. White wire off of the VR goes to stator, and yellow/wht goes to B+ terminal. You could buy a new alt from a parts store and take back the core later and most of the time they won't even know... trust me I work at one. This gives you a simple hookup, more of a DIY, and more amps to play with. The only other thing is that the alt bracket would need to be trimmed some... just another idea for ya

The Swede