I am building a 393 for off road use and want to find the best head for great torque and not too high of a compression. If I have to run 93 Octain that would be fine, I just want to avoid having to use alcohol. Someone had suggested to me that I should use AFR 185's and then when I told him that I wanted as much torque as I need to spin 44"-54" super swamper boggers in the mud he thought that maby I should use AFR 205's instead. I would like to go big and get more power but not go over board. What would be the best head to use?