lifter galley crossover tube

Yellow Rose I wanna do this & I went out & looked at a SB crank horizontle on the bench & I could not grasp it with what I had to work with right then. OK: to correct oil timing I need to block the OE feeds in the block 12 o'clock saddles (all 5?) & drill/tap/feed oil into the caps at 6 o'clock correct? (all 5?) AND do I need to cross drill the crank? & if so how/where do I drill? thank you!
Found these pics. Similar to what you want to do but yours would be inside the right Yr.

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