470 BB race motor. Oiling mods?

If I use the 1/8 set screws plugs like you mentioned. I assume that the size hole you drill into the lifter galley oil supply is 1/8 in diameter? Seems to small to feed the heads? Is this correct? Thanks

I`ve got 1/8" feed holes to each head, but my rockers are all non-roller bearing, or bushed type, w/ .008 to .011 between each set of rockers for side clearance-as recommended by hughs engines. ain`t like its going to be spewing oil freely.
any thots or comments welcome--------bob:coffee2: