I have a question regarding big bore kits for our motors that I have been meaning to ask for sometime so nows as good a time as any...Both the 790 and 865 motors have the same compresion, in order to get to 904 the 790 will increase its capacity by 114cc the 865 by 39cc thats a big difference, so which engine winds up with the 12.1 compresion and what does the other one get..hmm
