Here's my reply in a similar vein from back in Dec.;
oh boy would YOU be getting reamed for not Searching if the server hadn't wiped out everything....
There's about a billion documented causes of off-idle stumble;
water pump - yes, it drips on the opti
that'll get you started.
Of course several overlaps with your list -Wolf, but I notice no mention yet here of intake manifold leaks. That's so obvious (and gotta be real common on a 15 year old iron motor) that I guess I always overlook it.
\'96SS SOB: SSRI, Herter Tune, Tri-Y II, SLP SS, 3000 Edge, F/HO bars, METCO extendeds, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear)
\'96FWB BUW-Butt Ugly White: [gonna change that just as I did my last one] boxstock [yep, that's changing too]