10.5:1 is way too much for a turbo set up! You talk about the simple project you wanted. Who made you want something else? There is a good story in Bill Fisher's book about a strong street engine he built for a guy who was impressed the next weekend by a race engine and made a lot of costly less streetable changes. The hardest thing to do in this game is to be honest with ourselves and plan an engine that fits our true needs. A friend of mine has for years advocated the "best" (simplest) street motor as a stock 250 with a draw through turbo. Engines were plentiful and cheap then. His plan, build a turbo set up and run it on junk yard engines till you blew it and get another. Somewhere between this plan and yours there is a strong drivable 250. Where are you going to be when the "snow ball" melts?
