A few thoughts on your project....We built a 354 Plymouth Belvedere back in the 60's. The transmission was the stock '57 3-speed stick, used up every one of 'em for many miles around.The Hemi would spin the wheels in high gear (gravel roads) any time you punched it, up past 100 mph. Fun! The only 833OD's I have any experience with are the aluminum ones, ndg for any power at all, 318's grind them up. The iron, non-OD ones are very strong, we had one behind a strong 440 and never had any trouble. That Hemi needs a real good clutch behind it, though, the torque is awesome.