3.27 Ring and Pinion

[bdtutton]

My 1930 Tudor has rear storage compartments (A Basement) under the rear floorboards. They are great for storage, but are very close to the driveshaft, making it impossible to install a Mitchell overdrive.
...So I am thinking about installing a 3.27 Ring and Pinion because i would like to be able to cruise at 55 mph without over revving the engine. Has anyone put one of these in and if so...what did you think of it??