Maybe it's a pipe dream? I love the look of the 2000's Astro/Safari vans. I love to build sleeper style cars. There's no fun in playing around with a hot rod if everyone knows it's a hotrod. My last build was a 96 chevy express hi top conversion van with a 383 stroker motor and fully built trans. That was a lot of fun to drive!!! The Astro van would be so much of a better option due to its weight. I think a v8 swap would require to much modification. A 4.3 is basically a 350 with two less pistons. Is there enough room up front to mount twin turbos? The sbc engine has turbo manifolds that are essentially mounted backwards so the exhaust exits the front, the turbo headers for the sbc engine do the same thing. Could the header be modified to remove and block off the 4th exhaust tube so it would mount to a 4.3? Then mount the turbos up front like the sbc guys do. Or use a design like the 3.1 turbo with a crossover pipe to connect each header and run a single turbo? Just brainstorming here. Lol. I can't believe it hasn't been done like this, but maybe that for good reason? I hate the idea of rear mounted turbos! A turbo (or twin turbo) AWD 4.3 would be great in this unassuming family cruiser. I just started researching this so hopefully I'll find info that supports doing a build like this on one of these vans.