No VIN programming on our old stuff, so that part you don't need to worry about. Just have to find a compatible computer.
The only thing I can think of that would make a '93 different from '94 and '95 would be the E4OD changes in '94, but I believe they were just wiring and internals changes; what the computer does should be the same.
But you'll have to tune it yourself. It's really nice and a great tuning tool, but it's not a panacea...
So how does Push-Start vs CCD TFI impact computer choice??