Apologize if this has been discussed before I read something recently about lock-up transmissions and rear end gearing. For a while I've been considering a 350 turbo to 700R4 swap ( I do a lot of highway driving). What's the rule of thumb regarding gearing and non-lockup/lockup trannys or overdrive/non-overdrive? (Right now I'm running a Turbo 350 w/ 3.08 gears front and back in my '73 k5.) Thanks!