I'm happy to let it be known that I like a good B-Body. I have very fond memories of my Dad's '81 Caprice Coupe, and get to relive them a bit with my brother's '78 Bonneville. Granted, the Caprice had an engine-swap from a late-model Monte Carlo SS, and the Bonneville musters about with the "reasonable" 301 V8. But a diesel-powered B-Body? No. I'm sorry. I mean, it's "cool" in a "Hey, look at that" sense, and that's really about it. In the context of the era, it was a joke, and not much more.
The only thing worse than that from GM at the time was the 8-6-4 Cadillacs. God help them all.