Hello elite92 welcome to the site!
96 Blazer, the little one? I had a squarebody 94 one. Tahoe is the big one. But neither is a straght axle, both are independent front axle setups. It would definitely be a unique setup in a Chevy van. I've seen the new Chevy all wheel drive Vans all off roaded up. Similar front drive, I would guess. They will take abuse. Arne of AMS, Turbocharged one and used it as a tow vehicle.
Vinwki. Great Youtube
Usually see Vans converted to 4x4 using leaf springs supporting a conventional straight axle setup in the front.
Glad to have you here, interesting project mate!