[Keithc8]

We need to bore the Dart out to a large bore and get the cubic inches up on the engine. You did not say what head you were running or the size of the exhaust. This where most Cobra's are killed is with the small exhaust primarys. we would need to get the iches up around 351 and look at the heads and install a solid roller. The Weber carbs may be a restriction unless we get some that are capable to produce 500HP. You may want to give me a call and discuss some options for you. Thanks Keith Craft