Don’t even consider a 2 speed. They have their advantages but also have their disadvantages. To achieve the tasks of breaking your speed barriers, you simply need a few more teeth on the clutch bell and more RPM’s out of the engine. I have not been able to achieve the RPM’s with mods that some of the other guys have but seek out and spend the money on having your engine moded. The SWK .26 is already a racing engine and has some very extensive port work from the factory. However, by the likes of people like RB Mods (recommended) they are taking 34,000 rpm engines and turning them into 50,000 RPM screamers. And will do so for all of about a $150.