Yes,modern porting is no longer about big holes,it's about velocity too. And the valve spends more time partially open than fully open so low lift flow rates are important.
Is there any reliable dyno data on a 235-261 done in the last 10 years?
There was some info here on a 302 GMC a few years back. I believe it was about 250 HP and 340 ft lbs of torque with a well massaged head and other typical modifications.
It'll take alot of dyno and or road testing and piles of money to get real power from a 235-261
