I've been building engines for over 40 years, lawnmowers, turbine, rotary, 2 strokes, 4, 6, 8 and 12 cylinders. I can tell if an engine has been highly modded by a simple picture of the engine. You don't have to take it apart, I'll know. A parts list of what components and specs you used in that engine would work also. But since you haven't posted a pic I'm calling BS on this 4 cylinder engine that can smoke 35" tires.