My local track is starting a RWYB single cylinder open class I have a 15 Kinetik roller I want to stick a power house on. I’m split between a built animal on alcohol, a blockzilla 3” bore, a built flat head on alcohol, a 2stroke 250cc dirtbike engine or a KT100. What would y’all recommend. I’m running slick tires and just want something that will scream. Only issue I have with the dirtbike engine is having to shift and use clutch. Any expertise opinion is greatly appreciated. Mostly racing small bull ring tracks.