Hi I run 2.73 rear gears in my 54 car with a 3spd. Your 3.08s in O/D with a T5 would be a really close final ratio to mine. I thought the 2.73s would be to high and Id swap then later. Well I love it I can cruise 65 all day and get 24 MPG! from a stock 235. Seems the ol motor likes pulling around those tall gears. Your truck should have fine getaway in town with the 4.03 1st gear.
