Hey guys long time. I tried posting over at thirdgen, but maybe here would work as well.
I have a 91 s10 4.3 that was upgraded to a 1227747 then to a 16197427, and that's where it's at now.
I currently run Dimented's MAF code on it, running with a 5.3 maf sensor and it's great. I've taken a look at "TBI Guys, time to update thread!" over on thirdgen, and if i missed it I'm sorry.
Anyway

I have the Single 2 speed Taurus fan
Currently use the volvo temp switch wiring, (switch having issues, and wanted to let ecu control it anyway) and wanted to use the existing relay's and wire to wire it to my ECU to let the computer turn it on or off at set temps.
I know with the Maf certain things like using the EGR input would be viable, but I don't know how to go about wiring it physically to computer, and don't see flags or anything for maf code (think it already has the cooling fan code because there's flags set), to go about it. If that's the case Ill throw my egr block-off plate on since it's not doing anything anyway.

my current wiring

Thanks for looking.
Screenshot-20190102-200133.png