Roller Lifter Options for 59 deg R1 Block

512Stroker said

Are you running the stock oiling system and lifter bores? or did you do some mods to the block?

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I posted about the ultra pros as well. In both cases i ran them my lifter bores were bushed and i pushrod oiled.
I ran production block and an X block. Stock oiling system.I Used Precision tweeked oil pumps. They do a nice job blueprinting Melling pumps