Swapping in the 3:55s is a piece of cake in your 49 and the modern brakes are a bonus. Have this set up in my 47, I'm sure it's even easier in your 49. Believe the standard trans cars in 53/54 had a ratio of 3:70s which isn't bad either, most guys overlook this option. Difficulty now is finding either of these that are not rusted to bad. Last two I checked out were pretty bad.
