I believe KB says .006" per inch of bore for naturally aspirated rather than the "usual" .004. More if it's going to be driven hard. So I'd go around .028 for the top, and probably .24 on the 2nd.
Yes .0065 per inch of bore. I'm going with a moly ring. I'm hoping someone chimes in and can let me know if they had to file a regular .030 ring to hit those numbers. Otherwise I'm searching for a .035 over ring.
