So update, the problem still exists, between 2500 and 3000 rpm I get misfires.
I finally broke down and created an access panel to get to the rear (in-tank) fuel pump.
I was very surprised at how clean the tank was. Zero sediment but the fuel gauge had stopped working and the pump was making no noise so change it I did.
The gauge is good to have back, and I hear the new pump working. There is no change on the pressure measured at the fuel rail, but I am not able to measure it while I am driving, only in the garage.
I also checked the fuel filter that is between the tank and high-pressure fuel pump and turns out for my 88 that it has no filter, only an empty cup so no blockage there.
So replaced items now include
Rear (low pressure) fuel pump
Front (high pressure) fuel pump
Front in-line fuel filter
all 6 fuel injectors
all 6 spark plugs triple checked gapping of .044
all plug wires
ignition coil
distributor (to include cap/rotor/pick up coil)
MAP sensor
Idle Air Control valve
Throttle Position Sensor
PCV valve (and grommets that had the consistency of gummy bears)
Inertia switch bypassed
Key On Engine Running gives 11 (System OK)
I have checked timing many times and it is set at 10 degrees TDC base timing with SPOUT removed.
I cleaned the throttle body and intake as well as I could with cans of Throttle Body Cleaner.
Checked cylinder compression and all are 150 (I don't know how to do a leak down test)
I ran a can of Seafoam through the system with 1/4 tank (maybe less) so pretty concentrated.
I opened up the computer and it is beautifully clean, no corrosion on connectors or anywhere on pcb.
Wiring harness near computer looks good, no abrasion, ground is secure.
Access panel creation:
drive.google.com