For what it's worth. Me and my buddy took his 727 (69 Charger) to Turbo Action, here in town, 2 weeks ago. Paul Forte gave us the shop tour, and I was full of questions. The first one was: bolt-in sprag?
Answer; no, they tried it. Mopar heat treated them,for awhile, but only made the metal brittle. The trick: never come out of wet onto dry. Even on the street, like pull off on the shoulder, spin up, and hit the dry pavement.
Never wet to dry. I asked about low band apply, asked about everything; answer: no wet to dry.