Sorry, $5500 is cost prohibitive for non racers. The discontinued MP/SB blocks and Ritters blocks are/were cost prohibitive for non racers. If I was racing on a regular, for the money, heads up style or very serious in the brackets, not a problem. But standing next to a F or C brand, still, it’s out stripping my wallet. Add the insane fee for stepping up for $300 48* blank cam core only to be sent out for grinding, cost prohibitive. I can only go as fast as my wallet says I can.