Long story short... Have Megasquirt, hate it (was installed incorrectly harness so molested at this point that its depressing), want to go OEM or as close as possible.   
  
Have: 
1971 240z everything is stock 240z besides the engine. 
GM hei ignition 
1981 280zxt engine 
  
Currently on engine: 
external '81 Distributor 
megasquirt ECU/kwik wire harness 
'81 280zxt injectors 
  
So... 
  
I want to remove the MS ECU and associated wire harness, Have a 1983 280zxt Engine harness/ECU/Distributor (10notch on spindle). 
Can i remove the MS EC/ Kwik engine harness, using it as a guide for wiring the '83 harness and retain my '81 distributor?  Or do I need to modify anything and use the '83 Distributor? 
  
Thanks for any help