It's no wonder the Slant 6 is so great!
I had a bunch of slants, took my driving test in one with a three-on-the tree.
Only had one come apart, in my first Duster, kicked a rod out the block on a 120 mph down hill run.
They are good engines, for what they are.
The last one I had was still really smooth, for a stock 76 Duster. The damn thing sat out side all winter, come spring time one pump of the accelerator, it fired up and idled. It was a really sweet driving car, one finger on the steering wheel.