Totally Dissapointed!!!!!

Yep: They are KB167 .030. They are 68 cc heads so how much milling will be necessary to get to 64 cc or can it be done? How much milling would need to be done on the intake to keep the bolts lined up? I'm going to bed and read my Mopar Muscle and see if i can find a SB recipe. I'll check back tomorrow.