Current record for Classic Production A-engine class (440-500"ish) is 237.7mph, so not to be greedy, I'll settle for 238mph. My 9" with 2.47 gears should put me there at 7200rpm with 28" tires, assuming minimal tire slippage. Faster is better, bur a two pass average on two consecutive days in the same mile of 237.8mph will do it.