I replaced my tbi engine in my 62 suburban with a 99 Vortec 5.7. I swapped out the black box for a 0411 pcm and wired it for an 02 van. I removed vats on the pcm. It hits on a couple cylinders but won’t start and run. Crank re-learn? The computer is reading rpm according to live data on handheld scanner.
Any thoughts?

thanks,
Rob