Ahhhh. Thank you. I owned two Novas (a '67 coupe and a '66 SS hardtop). Both had 327s, but the '66 was built with more horsepower when we re-did them. The SS package on a Nova was a trim-only package (at least in '66 and '67), as you could get the '66 or '67 SS with a straight-six.
I got cheap insurance as a kid, because the Nova was classed as an "Economy Vehicle" since it did come with a six...