BB and modern 8 speed Auto transmission ?

It's far easier said than done. The trans is shifted by a computer that takes inputs from a variety of sources. Speed, engine RPM, manifold pressure, throttle position, coolant temp, etc. If it sounds familiar, it should - basically the same parameters as EFI.

You can't gut the electronics in the trans and just use the solenoids...for the most part, the solenoids are the electronics.

Chevy guys are Chevy guys...but one area they beat the Mopar crowd (and always have) is in breaking into factory PCM's and learning how to re-write code.