Yes, you really should put a PS pump & gear in your 63 PU.....trucks are really a pain to drive without an assist.....I'll assume you ride is all tricked out & you probably have an aftermarket steering wheel of a more conventional size. It is probably smaller than a stock '63' & the reduction in mechanical leverage with the smaller wheel will really give you a workout as you wheel the PU into a parking lot to show it off.
However, if you have the forearms of 'Popeye' it won't matter.
________________________________________________Rick.........