70 340 HP handling ability.

I wanted to do a turbo on my duster until I realized how huge of a fabrication project it would be; headers, hot-side plumbing, mounting the turbo itself, intercooler and cold side plumbing, plus engine management to control boost. A centrifugal blower is basically a bolt-on and the controls are more straightforward. For a turbo setup I'd need to blast apart the entire front end of my car and probably relocate a bunch of things like the battery then proceed to fabbing everything. I'd love to be wrong but nobody makes turbo kits of any sort for A-body Mopars and I don't have the fabbing experience to go into it gung-ho.
Damn fine points and I cannot argue with them. I will say this after you build one it seems like it was easy. You look back and say “that wasn’t too bad”. I built a set of under chassis headers from scratch once and that was way worse than any turbo parts I’ve ever built. FYI the engine management will be the same for turbo/supercharger.