I'm having my turbo 350 transmission rebuilt for a bracket race application. The car weighs about 3350 and has a 500hp 383 sbc. My question is in regards to the sprag. Do I need an aftermarket direct drum and sprag such as the one from TCI or can I get away with just a hardened outer sprag race for an application like this. Also what other parts would be recommended for a build like this. Any input would be appreciated. Thanks Andrew