thanks Stefan,
I bought the 22RE engine with manifolds and computer/EFI harness from an auto 126kkm drivers-t-boned '87 Corona, and it has oxygen sensor. I presume TCCS, but I dont have grey diagnostics plug, perhaps that came in later era. I didnt get the AFM & its harness or relays I need with it.
Since found out AFM is required as you said, and nothing but the original provides the same operation, so I'll get the remaining parts I dont have immediately.