How Would You Build This Stroker?

I would like to, put a lot of thought and research for that engine, love the idea of 5.13 geared 400hp plus 273 roaming the streets. The engine size don't bother me just the bore size, probably give up 30 or more hp across the board. I just see engine size as a power band selector anyways.

If I was to build an engine from ground up it would be a 340, if from a low mileage short block it would be 5.9.