If you don't have the fancy tool rests on your bench grinder, tack weld two 1/2" nuts together (flat to flat ) and you have a drill bit sharping guide. Put the bit into the v and and you can see any flaws in your bit and the angle is about right.
51 GMC 100 with 59 chevy 261 under the hood. 3 on the floor with 3.42 gear.