[Mike Taylor 3601]

Usaully I prime and see how rockers are oiling if they are oiling too much then I restrict them small block uses same restrictors as big block, I did'nt see what type rocker you are running roller rocker can get by with less oil than stamped.
If lifter is'nt offset you can install either direction as long as recessed groove on lifter is lined up with oil galley it will work .
Mike Taylor 3601