some guys have chronicled their work in trying to use all the oem computers and wiring and sensors as is. And then that not working and trying to unpick the things they don't need. And then going to hotwireauto to get something that works. Or buying Holley stuff.
From all I've read, you would have to be very dedicated to the cause to make the OEM stuff work - so much so that you could legit go use your vocational skills to make the money needed to go buy the holley system and maybe be happier.