273 with the 4 speed can be plenty perky on the street. Keep the tire diameter same as factory to help with acceleration. D70-14 for '67 was the biggest. Thats around 205r70-14. 215r70-14 would be OK too, but IMO not with a 2.94 rear.
Horsepower is really about high rpm. The big numbers at 6500 or even 5500 rpm don't give a good indication of street throttle response and fun factor. You'll notice that hp only when passing on the interstate to some extent, and to a great extent when running 1/4 mile.
