right now i am currently at 10.6 compression ratio.. i want to run toda B's or buddy club spec4. what is the compression to get to that level? im thinking 11.5 so im going to use high compression valves and a 2 layer headgasket.. how much should i mill my head to reach my goal? 11.5-11.9 is where i want to be

 

suggest pistons replace, if u are going to pull the head off.