Ok im about to do a mini me head swap on my 96 civic coupe i have done this swap before and i want to know that what gas do i have to used(87,89, or 91) to make the car run proberly, Im take the middle layer of the head gasket off ( first time do this part) and the compression will run 11.1.1 or 10.5.1 something like anyway with the high compression what grade of gas should i run

 

91 either way baby the motor man