When we installed new lifter bushings in my BB wedge it had little oil flow up top. I grooved the lifter about .020x.020 from the band to the feed hole. Many said that was too large. However it'll hold 50psi@idle hot, 80psi@7000. The rockers don't see a lot of oil until about 2/3's lift. Lobes are .484/.470. Same pushrods and adjusters since day one, over 1000 passes. Doug
