ARP main stud and oil pump clearance

I've done some searching, but not sure what my best option is. A) Run stock bolts B) Run 12pt bolt w/o washer and slightly clearance pump C) Grind down stud and use a 12pt nut w/o washer and clearance pump D) Spot face cap enough to use the std stud and 6pt nut w/ washer, and no pump modification. I choose D since it retains the strength of the studs, and torque accuracy w/ the washer. I don't like the idea of unequal torque, nor inaccurate torque w/o the washer. Anyone know how much needs to be removed and still clear the washer? Is this not a good idea? What do you all suggest? Thanks