im going to replace my battery with an optima anyway but does anybody have a h.o. alternator they recommend I have a decent size system and even with a capacitor if I even turn the heat on the batter gauge goes down to like 11

 

96-98 v8 grand cherokee. 136amp compared to your 90. 35$ at jk

 

were is this and its a direct fit?

 

He said at a junkyard. Yes.