The reason I want to so light is to rev as fast as the 340 and longevity of the engine. I don't want to tear it down every year. I am open to switching heads. I didn't know if it was worth the money to put into the heads. They came stock so, I am open to ideas of heads to use on the stroker. I plan on going with a solid roller cam. I know I will have to adjust valve once a year. I only plan on about 5k miles a year.