IMHO
The one 1J/2J has an inherint problem with their starter relay. You wont find one that has not encounterd intermittent and then total failure. WONT START!
I laugh at the number of Supra folk that replace starter motors, fuel pumps, ignition, wiring, relays, and even disable/remove/replace their immobiliser and all manner of things. BUT there is a cheap $30 and complete fix !!!! that I wont elaborate on because I own an R32 GTR!!! ......
Now with a NITTO oil pump and full engine rebuild due to not knowing the achillies heal of my GTR at time of purchase.
Supra = straight line and cheaper to buy kw's. Add a few corners and the tide turns - Dramatically!