Crank bolt to hold damper

I would also go ahead and get a one inch countersink to spot the crank snout with before drilling. I think your best bet is to go straight for the 13/16 drill and 7/8-14 tap size. The stock 3/4-16 drill size is 11/16, so you'll still be maintaining a 1/32 inch thread depth but with a slightly coarser pitch.