Depends on your definition of 'easy'. Most guys have to cut and re-locate the tranny crossmember to fit the later trannys into pre '55 trucks. I don't know if the clutch will work with a later tranny, or if the later tranny will bolt to a 235 bellhousing.
Also, you have to use the rear axle from a S-10 truck or something to get the hub-to-hub width right. Then have a custom driveshaft cut to fit, after you re-engineer the rear suspension. I think the leaf spring perches are in a different location than most post-55 vehicles.

Later trannies and rear ends are a popular swap for those who want to drive their trucks at highway speeds. Just takes work and junkyard huntin'. Im sure somebody can tell you exactly what parts you'll need.

chip

Preaching the Hot Rod Gospel according to the 4-stroke apostles:

Suck, Squish, Fire and Fumes