Drive by wire to cable conversion

hi everyone

I just got a gen4 6.0 it has a twin turbo setup and a drive by cable throttle the previous owner had it on a sand buggy tuning a MEFI ecu which he will keep.

The question here is that it’s a 58x (from the sensor and the front timing cover) how could I run the cable driven throttle body with a gen4 gm ecu, or is there a way around it

You can't run cable throttle with a GEN4 ECU. They never made GEN4's with cable throttles. GEN3 engines (LS1 etc) did, but this isn't a GEN3 engine. You will have to run a standalone ECU, or electronic throttle.