I agree with dwayne, If you allow the Mega blocks and R blocks your going to have people showing up with 540 plus cube BB and 430 plus cube small blocks. Then the guys with 340s and 440s wont have a change. Plus its going to lead to the after market block guys wanting to run bigger heads to feed there motors because it wouldnt be fair for them not to be able to feed there big cube motors.

It seems like it takes away the entire point of the class.