yea obd1 is just a more stripped down verison. for the most part, its the same kinda stuff, but there is no need for all the stuff that throws CEL's in the stock ECU.
on my car, i have it set so that the ecu is not lookin for any sensors, other than the VSS, TPS and like a few other things i know im forgetting. i dont have my knock sensors connected, or just about any other sensor. the only o2 sensor i have is my wideband which is not wired to the ECU at all, and thats about it really. the one thing i wish i could elimate tho, is the automatic ignition lockout solenoid. i have it wired so that the car will start and stop and let me take the key out, but it displays that im in park, and reverse, and its just kinda... annoying when people ask me why its doin that and i gotta explain that all. lol. maybe ill just paint over the part on the cluster that displays the grears, or ill get really creative, make a new backplate that has 1,2,3,4,5 and R and then wire some kinda cool system to my shifter so i can see what gear im in if ever in doubt LOL