63,000 original miles. Heck the engine might have only had 1 or 2 rebuilds?
I'd vote for an authentic restoration - all parts similar to original, and original paint scheme.
The 1955-1st exterior paint scheme is slightly different from 1954 (mostly the grill colors). Also, both 1954 and 1955-1st trucks had several factory 2-tone exterior and interior colors/trims (the 1955-1st at the HEmmings link abobe is a 1954 paint s heme).
No matter what you do with the drivetrain and suspension, if you want original interior/exterior color schemes, post questions here.
