Thanks for the explanation. Helpful indeed.

Out of curiosity - probably will stick with current 347 short block rather than upgrade to an GM Crate LS2 376 built for boost. But if I did so then I would have to use a later PCM. So a 'what if question'.

Because I have a 98 pcm and my car is ATI supercharged, my tuner converted my maf tune to sd and installed a 2 bar map sensor- something about reading tables and cells for higher boost levels not available in the 98 pcm - fooling the numbers is best way I can explain because of limited capability of the 98 pcm to read higher boost up to 15 lbs. Tuner uses EFI live.

So if I was to repin my 98 pcm over to a 99 to 2002 PCM then I assume I would use one V1 license because the pcm is no longer a 98 but instead a 99-2002 pcm.