first - advertised cr from Chrysler on a 318 is:
1968-9 9.2
1970 8.8
1971-3 8.6
It sounds like KB167s would do what I hoped to accomplish. I'm not going drag racing with this car but it would be nice to get compression up to 9.2 to 9.5 as long as I'm replacing pistons anyway. Thanks for all the info.