You're probably right. I think I was mixing and matching years and HP figures to come up with 215 HP out of 230 inches. - Q
No, you were ok, the 67 Sprint I had was 230CI with 215 HP in stock form, then late 68 into 69 it went up to 250 CI.
I've looked this up in multiple sources, and was always impressed that my little straight 6 had a 4v carb and 215 HP in stock form... better than many V8's! And that always stuck with me...