I just noticed the suggestion of converting to an aluminum driveshaft. After my experience with an aluminum driveshaft on a GMC truck with a 350 ci V-8, I would never do that. The driveshaft corroded, and one day pulling away from a stop sign, it totally broke in two with the driveshaft flopping around underneath the truck. I hate to think what would’ve happened if I’d been driving down the interstate at 65 miles an hour and had that happen. Of course, I have to confess I did use the truck to pull out some for firmly rooted bushes and small saplings. Nevertheless, I would not trust an aluminum