I actually have a Buick 455 with turbo 400 transmission that I was thinking of using. I would then use an NP 205 divorced transfercase for the 4-wheel-drive. Now things are really looking heavy! Concerns were that the front driveshaft would be too long, rear driveshaft too short, steering clearance issues, fuel economy etc.
Plus I have to admit I've always loved the 292 ever since my first one! That engine never gave a lick of problems!
Craig