It gets great mileage, but the hood’s up a lot...

If you're breaking stuff and it's a custom job you did, do it better next time. Not a big deal really. You underestimated the punishment a heavy truck can dish out to it's driveline. So fix it strong enough.

That’s true. I should have gone with Cummins biscuit mounts on both sides from the beginning, rather than trust the Spool motor mounts. I definitely underestimated just how brutal a diesel is on motor mounts.

Actually, I’m pretty sure the original mounts on the diesel also had a hydraulic dampening system (sort of a strut), but they wouldn’t fit in the truck.