More horsepower & faster (60ft. & 1/4 mile!) than the 454SS of the same year! 40/60 (fr., rr.) split 4 wheel drive.
The truck version only has a 500lb. payload, though.
Off the showroom floor, bump up the timing, add more boost (14lbs. stock) a tank o' premium, check the tire pressure, & they would run low 12's, high 11's! But to do that consistently, for extended periods, mods should be done.
The transfer case is a viscous connection style. Apparently, the same one used in the all-wheel drive Astro vans.
Fastest factory production truck ever built!