ok i have a running 87 TII and the motor runs OK but not reliable enough so im swapping my 91 JDM TII that has everything. the JDM harness is cut to where the dash harness plugs to the ECU. the JDM harness has all sensors and plugs. so what do i have to do when splicing the JDM harness and USDM harness together?

 

Ironic you're purposly swapping out a running (AKA rebuildable block) to put in one that you won't even know that works.

 

i would say your jdm has a higher chance of breaking than your motor right now.

oh, and the answer to your question...
https://www.rx7club.com/search.php?searchid=1156674