70's Nova 6.0 swap tuning help

[F20bcd5]

Hey y'all. Working on a 70's Nova. 6.0 swap from an 08 express running a computer from a 2008 Escalade. Basically stock with an aggressive cam(forgot the specs but for what I'm being told it's wild). Questions about tuning:
I know I need a wideband, but what's the best way to access ve tables on these PCMs? What do people usually do to get or active ve tables because I've been looking like crazy for them but can't find them. I'm not new to tuning, just not that well acquainted with GM setups like this. I've done plenty of 5.3 and 6.0 vehicles, with older PCMs with ve tables. I tried doing a bunch of things to try and get it to run. Ltft and stft are running at -30 and vehicle runs super rich. If anyone has a file they could share, that would be greatly appreciated. Thanks 🙏

[5FDP]

An 08 computer uses VVE, that is under the edit tab.

Post the tune and logs and a more complete list of mods done. Like what MAF are you using, what fuel injectors etc etc. All of that must be correct as well as fuel pressure before you get too deep into this.