Thinking about a Gear Vendors OD. Can Anybody Give Some Guidance?

How much do you wail on your transmission??? If this isn't a drag car with big torque/horsepower, why not just swap in a Chrysler OD four speed? It seems to be the simplest solution. Same driveshaft, all the same hook ups, a lot less cost, one less system to have problems compared to the GV. Don't you have to do some serious floor pan work to use the GV set up in an A body?