grand cherokee alternator?

i seen a couple posts about using a higher amp alternator out of a grand cherokee. just curiouse which years of grand cherokee will fit? does it require any modificationsto fit? what are the benefits of doing this?
thanks:wave1:

you'll have to grind the mounting bracket slightly. I believe it's 97-99 Grand Cherokees that will fit, not sure on that, though. I bought a 120 Amp alternator, rebuilt, off ebay for $70 shipped that is a direct fit for the cherokee (it was actually an option for certain years as an upgrage to the stock 90 A alternator).

The benefits are that if you are running lights, A/C, winch, etc. anything that draws a good amount of amperage, a higher amperage alternator will be able to supply more, typically at lower rpm's as well. The stock alternator is fine even with off-road lights. I ran it until it died from the mud/water. I replaced it with the 120 A. Haven't noticed too much of a difference, but the interior lights don't dim anymore when the A/C and lights are switched on.

I followed this:

http://www.bc4x4.com/tech/2004/jeepalt/

Had to do a little grinding as mentioned but glad I did it. No dimming at idle with all the gadgets anymore.

this flier lists all of the vehicles that the 136-amp alternator was used in

thanks guys