I think the perfect truck would be basically right smack dab between an f150 and a ranger (size wise), supercrew, with a 6' bed, narrow but aggressive tires, part time 4x4 (none of that awd), 6 speed manual, with a 4.0l (with square dimensions) dohc 90* v8 with a single turbo with a low speed spool. the motor could also be a diesel 4.0l

Edit: Just did the math. Engine dimensions could be 3.38" bore x 3.38" stroke for a 4.0l, or a 3.40" bore x 3.40" stroke for a 4.1l