Can anybody tell me the diff. Mine are 69Xheads ported and polished 202,160 valves comp b-hive #26986-16,retainers comp#795-16 keepers comp#626-16,M.A.V.Jbowl hogg regrind for std.valves and bronze liners.I just want to know how much better the indy heads would be.Is there any comparison???
