The bigger question is what kind of gal are you building this truck for? More of a Cadillac kind of gal, or a lumber wagon kind of gal?
The stock leaf springs and straight front axle will always ride rough. Getting away from that will be expensive and require someone with exceptional skills to get it done right.

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission