The flow bench never tells you to make the exhaust bigger I don't know where you get this from. Blanket statements can be most sabotaging.
If you open 360 exhaust port up bigger and bigger...you can expect the low sub.450 flow to drop and see peaks move well into .700 lift. Using a 360 head...In many cases theres not enough throat/material to support the air at the turn, once the roof moves up enough... that's where the air goes and youll lose the ssr flow after .300..dead floor. A casting booger can be the root of higher lift stability in 'some' ports. Seen it myself.
Rough promotes a boundary layer and fuels reanimation with moving air. Does it effect speed, yes.
If it's all from reading books they don't need somebody to read a book and interpret it for them they can go read that same book and **** it up all on their own.
And this new attitude that if you don't have a flow bench you can't share well lets tuck our tail between our legs then:rolleyes: