There's gas stations out there that don't even carry 93 octane, so if you take your truck on trips and get in a tight spot, need fuel, 10:1 you can run something under with less worry than 11:1.

 

well the eddy heads are 63cc combustion chamber which puts me in a tight spot because now im wanting to get some aluminum heads however all the pistons on summit put me at an 11:1 ratio or they put me at a 10:1 with a deck clearance thats kinda scary. anyone else run into this?