I don't understand why people think you have to do something special to BB to make it turbo friendly.

There is a wonderful resource o the internet, Richard Holdner, he has a great very informative youtube channel where he boosts EVERYTHING.
It all about ring gap. He has proven the gen 3 semis only need ring gap to live under some boost. He took 440 motorhome engine added ring gap and boost. All dyno proven stuff.

Yes, if you want an all out 30 Psi turbo car you need to build the internals, but 7 to 10 psi OEM stock stuff works in most situations- with proper ring gap.