Those HP figures are comparing apples and oranges, since there was a change in how the horsepower was rated somewhere in the mid-1960's. The only way to get a realistic comparison would be to have identically set up engines side by side on a dyno. The old adage "There's no substitute for cubic inches" usually applies, unless one engine is designed for low end torque (the 250) and the other is intended to produce high HP at much higher RPM. Putting a set of 307 V8 flat top pistons and a RV-style camshaft in a 250 makes it run rings around a 230 in a truck. Getting radical with a 230 and building it to spin twice its designed RPM and stay together makes it really come alive. "Ya pays yer money and ya takes yer choice!"

I'm also in the process of hiding 260+ cubic inches and about 50 more HP inside an original-looking 216 engine block!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!