Is the "truck" going to become a" Cowboy Cadillac" or a weekend cruiser that never gets the bed dirty, let alone loaded to its capacity? If so, a couple of holes in the floorboard and a Fred Flintstone brake system will probably be sufficient. If it's going to do real truck stuff, even occasionally, going to a compact car brake and/or suspension system is irresponsible and dangerous.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!