This is going off topic for this thread but you would need to spend some time studying the system to know why.
I am a blue oval guy and I have been playing with converting carbs to EFI for over 10yrs. If the ford was easier or better then I would have used it.
Yes the throttle body bolts on easier but that's where it ends.
The GM computers are hacked by the aftermarket/auto nerds so everything is avail for free to tune them yourself.
I am not a big fan of aftermarket computers like fast or megasquirt due to availability.
If you break down who can fix it and where/when do you get parts.
The GM TBI was used on about 4 million vehicles and is everywhere including the parts stores and junkyards. So "if" I ever break down I can get the parts I need right then.
i do use a couple ford parts. I convert my old distributors to electronic using the ford duraspark pick up and reluctor. Same as the MSD probillet distr.
I also use the 4.9/5.4 yellow injectors for my MPFI conversion. They are everywhere and cheap.
And yes with a little knowledge you can read each sensor with a meter. But you can also pull into the local autozone and have them plug the scanner in and just tell you what is wrong. Or just jumper 2 pins on the aldl connector and count the flashing on the SES light. Just keep a little cheat sheet in the glove box.
HTH
Bill USN-1
