[V8] Running issues

[Paul DAnneo]

Hello All,
1st. Happy New Year.....
 
2nd. This is killing me.
Patient: 1991 Lago Blue V8. 150+-k
 
Engine idles OK..
As you give it throttle it revs slowly(not driving). Sounds like it's bogging down. 
Worse issue driving. Just feels like it won't go. On a slight incline, just about stops.
Occasionally get a 2113 code. Replaced the pass side dist. with a "supposed good one"
We have done new plugs, newer wires, new temp switch(back side of pass head), MAF(used), cleaned ISV. replaced fuel pump and filter(was filthy).
All the used parts were from a "good running" 3.6, same as mine.
 
On a longer drive, the cat light started flashing. Replaced, again with "supposed good cats"
 
ECU?
 
Whats left?
 
TIA,
Paul
 
Have a new 02 sensor, but not installed yet.