The best option is to make a bushing that uses the torque converter register. If I could takes pics I woull post up how I do it.

I never use roller bearings on the input. I know it's all the rage, but then again, so is hip hop. I have repaired about 25-30 input shafts that got jacked up by roller pilot bearings. And in the end, I end up making my own bushings. So I just make a bushing that uses the TQ register, as I said above. Then you don't have to worry if the crank was finished drilled for the pilot bushing.

Any freshman level machinist can measure and make a bushing. I'd bet there are many ltttle "home shop" guys within a 15-20 drive of your house who can do it, let alone a regular machine shop.