[MA70-3.0GT]

Yeah I wish I was able to get over to have a proper look into it, chewy electrical/electronic faults are well, maybe not my forte, but I love working through them for some reason (must be sick in the head lol) & I'd have got my '89 round for some swap-tests too

I've found even new rewire jobs can cause issues sometimes, would def be worth checking for any kind of short at the ECU pins for those TPS terminals if only to rule them out 100%. Also, what sort of wire was used for the rewiring you did? I don't know how sensitive the Toyota ECU is to RF or EM interference but could be worth making the TPS wires twisted pairs &/or wrapping them in foil to eliminate any possible outside interference from other nearby circuits seeing as they deal with fairly low voltages. Obviously you know the knock sensors are very very sensitive to this sort of issue & their wiring should be decent shielded/twisted stuff too (would imagine they're OK anyhow as interference there seems to throw a code 52 and you don't have that at any time right?) Depending how much of a pain it would be, I'd say maybe try to isolate all the low voltage sensor signals from the rest of the loom or at least any sensor wiring that was re-hashed for the transplant.

Another quick check on the TPS & wiring is to block the throttle open slightly, switch on the ignition & run a diag check. Should throw a 51 for no IDL signal at power up. Maybe covering old ground here but then I didn't notice if this check was done in previous posts... Damn I wanna look at this, it's screaming fuel cut at me....