Most people who pull a trailer that size use a 1-ton chassis with dual rear wheels and a big V-8, 454 or larger. You'll need a massive upgrade of the brake system, and it's highly unlikely the 235 or the 283 would move the trailer above 1st.-gear speed.
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!