Unfortunately, it's not even legal for that because 6100 has to be a 2008 or later sealed engine..... and there is no freaking way a coyote is fitting in there.... it BARELY fits the 8.2 deck of the 302 block...... So that means other than sportsman classes, its a tiny f'ing Trophy Truck .For fun, are you going to run it in 6100?
If I ever won the lottery or got a partner with a ton of money, I do think it could be made legal in class 7 if we could find an old 4.5 Busch V6 to put in it........ but I am not sure if that would even fit because it is based on a taller deck motor and might not drop in the hole. so maybe the 3.8 v6... or even an ecoboost 4 banger... none of which sound like as much fun as 500 pounds of torque in a 3500 pound car.
I definitely decided from the beginning that I wasn't going to try to make it fit in any boxes and just build what turns me on...and fits in an enclosed toy hauler... and run it wherever they will let me. .....So if that means trophy truck rear start, so be it!