It’s Winter. Let’s discuss strokers. How much faster

Rat Bastid said

It really depends on the induction system. One you’ve outrun the heads, adding duration will only kill bottom end power.

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but if you have a big vert, bottom end power at the track is a non factor. And more duration generally will make more power in the upper rpm range.
My vert flashes 5k… motor lives between 5/6500 whole length of track… if i pulled my 260/264 cam out, bumped the duration up to 265, car would be faster, would bet on it…. This all assumes compression isn't a limiting factor.