340 or 408?

Newbomb Turk said

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”.

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I agree with you there, it's like a bad infomercial where they stumbled around, scratching their heads to make 500 hp until they pullout the all new shiny 4" crank then everything goes easy as pie :)

I don't get why people over sale the hardship of less displacement they make it sound near impossible just be realistic.

There's reasons to go either way and the OP has to figure out which way sounds more like him.