Need quick answer on lifter crossover tube!!

You need to use 1/8 npt-27 with a 11/32 drill bit. The tube can only go one way. Just behind #4 cam bearing seat and in front of #2 cam bearing seat. The oil galley on the right side has to have a plug installed behind the cam plate to block the feed to the front main bearing. The front main will now be oiled from the left galley. You can also drill one of your cam plate bolts with a 1/8" drill bit (all the way through) and install it in the top right side of the cam plate. This will help drain oil out of the galley and provides oil to the timing chain.