454 TBI swap from refrigerated box truck, timing problems I can't figure out

[Fast355]

I've been doing more research. This 1227747 ECM came with the 454. Is that normal? So basically I am using the ECM from the 454 with the other truck's wiring harness. Maybe that is causing the problems. That is how I was able to connect 2 O2 sensors because the harness had 2 spots for them. I don't have the original emissions label.

I never have seen a TBI truck with dual 02 sensors or even dual o2 sensor inputs to the ECM.