What Crankshaft to Run in High HP Turbo Slant Six

Looking for information to start a 500+HP Turbo Slant Six build. Specifically, I'm looking for what guys are running for crankshafts and are there any aftermarket options for bore+stroke combonations etc. If sticking to the stock crank what is being done to accept the boosted power?

The reason there are no "stroker" cranks available for the 225's is, the stock stroke (at 4 1/8") is already too long. You can utilize increases in boost levels for more power; forget the stroker... not needed, here. :glasses7: