If you have ever seen a 1:1 ... it is boxy and broad shouldered, which was an intention of the original designers.
The dated custom wheels are the only thing really holding it back; it is infinitely more compelling with the Torq-Thrusts available in one of the Monogram 1/24s - or the surprisingly good Cragar SS in the '78 Elco.
Engine wise, if it was any more Pontiac, it would be leaking oil and boiling the starter cable (do not ask me how I know this, lmao.)
The single greatest drawback is the 1/24 scale, but if you don't give a RF about that, it practically snaps together. Should you decide to be an utter delinquent, I've seen a few bashed with the 1/24 '66 Chevelle SM, ( cos that's the way uh-huh I like it.)
Future plans for the few in my stash involve body being draped over a 1/24 Monogram NA$CAR chassis... snagging a correct Ferrari GTO engine and committing utter heresy (you should see where the Pontiac is going) and finishing the replica of the '64 owned by the guy who did me a major solid on my 421 engine purchase.
I did one many years ago that is still one of my faves, promise to look for pics this week to share.