Stripped bolt hole in balancer.

[kcfirstbuild]

I did NOT strip the crank, but one of the three the bolt that hold the pulleys on. I'm going to try and run a 3/8-24 tap through to clean it up, but if that doesn't work.
Since I still have two good 3/8 holes and the crank bolt / larger washer will i be ok not using the third 3/8 stripped hole. Or will that mess up the balance?

Could i use a smaller bolt and nut it on the back side?

Last result is heil coil it, its just in a horrible place.