Any tuner can make the AC and reverse lockout work in a b-body...TunerCat added the necessary stuff in the software probably 7 or 8 years ago now. The tuner just needs to know where to look.
I'm happy to tune an LT1 for anyone local to me...as radical as it gets, I'll gladly do it.
That said, I also recommend Alex at PCM Performance. He does excellent work, and cares about making it right more so than anything else. Reputations build themselves when you do that...there's no need to get a big head.
Good to know Ion isn't the only one who can do this. Two years ago when I got my T56 tune, the reverse solenoid A/C functionality seemed difficult to obtain.
I did convince Ion to "tweak" his tune for my Ellwein engine, and had it put in a spare PCM as well just because...
I guess I have Ions last LT1 tune.
I'm sure I'll need more tuning sometime, and I'm glad that there are other options.
I would think (hope) that over time tuners would take the best parts of each other's work and continue to improve the overall "base tune", although I do understand that each engine, especially built or modified engines, are different.