89 N/A No start Issue

Basically, this thread is a mini troubleshoot log so I can keep track of what I've checked and for any input from everyone else on what I may have missed.

Background: I have an 89 N/A/Auto with an 88 N/A/Auto motor swapped in from a wrecked Z with 13k on the odometer. From the condition of the Z it was pulled from, I believe the mileage is correct. Engine was spotless, all fittings looked fresh out of the package and no dirt buildup in any crevices of the motor when pulled. Swapped into 89 N/A shell that had prior auto trans as well. Ecu from wrecked 88 was swapped in as well at time.

Issue: As title states, car refuses to start. Turns over just fine but acts as if it isn't getting any spark.

I've checked the following things: Timing on belt and distributor is correct. CAS and coil both tested good, have strong spark to each individual plug. Injectors also are all firing and will "engage" when turning the distributor with ignition on. All sensors are hooked up and have been double checked. I have fuel to the rail and out of the return line. I haven't tested for actual fuel pressure yet but the pump was working when last motor was pulled (which ran fine). Tried another CAS as well as two different OEM caps/rotors and no change in "effort" when cranking over. I tried a bit of a squirt of ether in the intake while cranking and also made no difference/effort while cranking to fire over. I'm honestly a bit puzzled at this point. I imagine there is an issue with fuel delivery but I'm not entirely sure. I make take the rail out and see if the injectors are pushing any fuel out at all. The problem also didn't change at all when swapping in the original 89 ecu into the car. Any recommendations on what to look for? I'm going to mess around with it more this weekend and hopefully something will pop out to me.