honestly, a 4 banger in a small car would be just as fast as a large truck. and you would double your mpg's.
i used to own nothing but hondas before i bought my first jeep. the last one i had was a 91 civic. it got 35 mpg driving like a grandma, but it had plenty of power. then i swapped in a newer engine. it added 35hp. not only was it a lot faster but i also recorded my best mpg record of 37, and that was beating on it