lifter oil galley lifter help needed

I had this issue with the old Crane hydraulic rollers. Had the base circle reduced by 0.060" (they charged me) based on hard measurement & that did the trick but I have less lift than you. You did confer with your shop that the 0.040" would be enough? Would be a shame if it wasn't. One thing you may also have to deal with is pushrod geometry. On the OEM iron heads there is lots of interference. I spent many hours labor getting it right, a machine shop would have hurt me bad if I hadn't done myself. Maybe the aftermarket heads have more clearance? With all the headaches this caused me I would just go flat tappet if I were doing again.