Swap to TII is easy on a TIII car I did two of them.
Just use the TBI alternator sub-harness (unplug the TIII alternator harness) The cam sensor plug on the shock tower extend over the rad support and have it end at the distributor. That takes care of the distributor end. Extend the TBI AIS and TPS wiring to where the TII throttle body is. The TIII fuel injector harness works fine on a TII, will even stretch over to reach.
Gary D.