hi ive got a 1997 gmc topkick with a 3116 "puss" in it will a 3306 or 3406 cat engine fit in a top kick or should i just take it to a sale and start over ? I really hate to sale the truck ...i like it ....but ****come on loaded and it's a tri-axle dump to .....it wont pull a greased string out a cat's ***? can a bigger engine fit in it?? 