I have a le custom cam 215/223 .546/.557 112 lsa close to the crane 227.. I also have 26918 beehive 787-16 ret 648-16 locks.. pro form 66910 nsa 1.6 rr 7/16.. getting trick flow guide plates and comp 0.80 hardend pr. I am gonna tap the heads for screw in studs myself with the summit tool and clearance the pushrod holes with a 1/2 inch drill bit..Lloyd said I should get the valve guide seal bosses machine down to handle more lift b4 retainer to seal clearance is a problem..1 with this setup will I have retainer to seal clearance problems..2 how would I kno how much to have the shop takeoff the seal boss.is there anyway around this or how would I go about it..thanks for any help Lloyd said the beehives will need to be set at 1.740/1.750 for this cam I hope all these parts will go good together