Leon, I give you a lot of credit trying to make this work for you. As for why Chevy guys build those SB2 motors is they are cheaper to build. A dart block is no where near $7500 or from what others have said, a stock block will work as well. Plus making over 1000 Hp is pretty common as well. Still waiting to see a P7 make that power. Anyways, if Leon puts a Pro Flite behind his motor, it will definitely come to life especially in the 60 foot and that gain will show up on the top end as well. I've spoken with him before and he's one dedicated racer.