I'M FRUSTRATED!!!! (kinda long, sorry)

[OMAR]

My '93 has:
4.10’s, FORD “B” springs, rebuilt AOD w/ shift kit, Flowmaster 3 chamber catback, off-road H, equal length shorties, adj. FPR, fender well CAI, pulleys, MSD 6al, MSD wires & coil, MSD in-car timing control knob, NOS kit currently jetted at 125hp.
In this form, (not spraying off the line) the car ran a 13.19 ET. On street tires.

These parts added a few months ago:
TwistedWedge heads, E cam, new timing set, new lifters, new 6.75” pushrods, CRANE 1.6 stud mount rollers, StreeHeat intake, 24lb. injectors, C&L 76mm MAM. T-Body & EGR plate are still stock.
After these mods, I can’t get the car to run properly. It’s overly rich, bogging and backfiring. It seemed fine for a lil while and then something went bad. With the stock H-pipe on(for emissions test), the first cat on drivers side seemed to be getting a dull red glow, so I put on the off- road. Suggestions made are: 1. dist. off 180 deg. (I don't think so because the car runs, just very poorly. Plus it ran decently for awhile after mods). 2. Air pump not working causing O2s to read incorrect. (I checked the discharge tube that goes into the exhaust, and it's blowing air). 3. I can't find any vacuum leaks. After I shut it off, it won't start for awhile (I'm assuming it gets flooded). What else can cause this? I'm desperate! If I can't fix it, it's going to be for sale!