A-body 8 3/4 rear, redrill small bolt to big bolt?

I am thinking of buying a LBP 8 1/4 SL and wondering if anyone has ever redrilled LBP to SBP. Wouldn't be an issue except I just bought the SBP ralley wheels and SBP disc brake conversion, and have it all in my hands.
What to do, what to do???????
DR