It might be easier to just tune your stock black box PCM for the 350. I know the 0411 is widely regarded as a more customizable and more supported PCM than the black boxes, but it seems like every 0411 swap I see someone do here has lots of issues to work out before it's dialed.
JET DST supports the '96-'97 PCMs in these trucks, plus the 0411s and many other newer GM PCMs. It's an old program but from what I've seen so far it's very capable. I know we have a couple members here (myself included) who own JET DST and 5.7L trucks, we could probably get you a 350 tune to look at and compare to yours.
Thanks! You make good points, I think you and I have briefly discussed the JET DST before. The 140005 isn’t it? I’ll do some more research beforehand.
(I have already purchased the 411 and connectors but I’m sure I could sell them)
I sent an email to blackbear, I’ll see what they say also.
I don’t have access to a windows pc either, which I’m learning I’ll need if I want to (learn to) use Hp tuners, efi live, jet dst or whatever. I’m sure I could figure out how to use an emulator on my Mac book but I’d hate to risk bricking an ecm…