powerheads

https://www.youtube.com/watch?v=R0tjmcYIOlE I'm about to start a new build. I was thinking of powerheads people use to build mud motors. I'm talking serious power 8k RPM and above using clones. Okay, I listed them as follows: 4. HB non-hemi 3. Dynocams clone 2. HB hemi 1. Box Stock...