If you haven't done so already, I'd download the newest copy of the USLMRA rule book and read through the build requirements for the CP class. As far as aftermarket parts, I'd start with an aluminum flywheel, billet connecting rod, balanced crank, camshaft and billet retainers for the springs. That should give you a great start. Just like Chris said, you can go as fast as your wallet will allow. Hope this helps.
