I spent the summer pitting next to a guy with a inline 6 power 60's Nova. The car ran well Mid to low 14's with an auto. For those who are not familiar, here's an example:
I got to thinking on the late night drive back home....a turbo 4 banger would fit right at home in that engine bay of a early Nova or Chevy II! And what a shocker that would be to someone popping the hood.
I would estimate the cars are similiar in weight as they are in size. So a 12 sec car should be doable.
I'm thinking a complete engine/harness/ecm transplanted into the Nova would be a good start. I know they make mid-plate mounts/transmission adapter, I need to find them again.
Now I can't promise i could go through with this but it's winter and that's the time for internet searching and dreaming.
Maybe this will stir some conversation...