ok, preparing for oiling mods on my 71' 360 block. ordered the 1/2" and 9/32x12" drill bits. most of my 1/2" oil passages were done way back, so wont have to spend much time there. I will be opening up the passages to the mains with the 9/32" bit, leaving the cam passages as they are and blocking passage to driver side at #1 main, but leaving tube out of pass side. oil to heads will be restricted to .060 as I spray bar oil(previously blocked). hows that? think it will be good to 7500rpm?