ya my truck runs bad when i hit the AC switch no power engine surges at idle drive me crazy
i just want the room for a bigger rad / oil cooler / PS cooler the whole rad/evep and sheet metal up front is tweak from when i hit that deer doing 50 not alot but enoff 2 mess up holes /clips
look at a manual and see if they show a pic of with/Wo Ac and see whats diffrent.
even tho your 91 had less vac stuff it also is 3yrs older