W wake2wake New member Feb 6, 2009 #1 I'm building a 406sbc and was planning for 12:1 for the 105 octain E85, but I have heads for 13.2:1, any thoughts?
I'm building a 406sbc and was planning for 12:1 for the 105 octain E85, but I have heads for 13.2:1, any thoughts?