I wish my 258 cubic inch "216" was a little closer to being ready to run. Hauling the kind of load that truck does would work better than anybody's dyno run to give it a workout! Doing a basic rebuild on the spray-oiler 235 for now, and building up one of my 290-something cubic inch 261's with a 4 3/8" stroke for later on might be a good option. That one's going to have H beam connecting rods rated for 600+ HP, and around 9.5:1 compression.
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!