340 or 408?

273 said
It's only a crank you can build 500-550+ hp with any of them, question here is which one will suit the OP the best.

No it’s not. Not even close. The militant 4 inches crowd won’t accept that anything less than a 4 inch stroke has merit.

The OP can do 500 hp easily with 340 inches if he wants to.

Evidently though most guys on here couldn’t drive it because it would be too “racey”.