Ur c4 is not going to live real well at that much Rpm I know dynamic now has a new drum with abunch of little springs don't now much about it seen on here lyons pereformance sells it to help with problem I woul talk to Harold at Dynamic his drum, The powerglide will soften ur hit on starting line with ur little tires ussually by 330 mark be faster than ur c4 as much power as u have on motor and ur going to spray it should make easier to get down track talk to Lenny at ultimate about a converter.