Sounds like a good build for a street rod. The 66 Nova is a sweet little car and fairly light. The parts are a good combination - 350HP and 400 ft/lbs might be a bit "optimistic", but sellers have a tendency to overrate thing a from time-to-time in hope of enhancing a sale. Only true measurement is from a certified dyno, but who really cares..

Depending on how deep the rear end is, the 3000 stall might also be a bit high as well - especially with a Powerglide as they typically came stock with 1200-1500 stall speed. If the car has a 3:73 or greater ratio and you're planning a lot of rocket launches the 3000 may be ok - otherwise I'd look at 2000-2200 as being more reasonable. My opinion only - others with more Powerglide knowledge will contribute here.

Bottom line is if you like the car, the sound and feel of the motor and it's a price you believe to be reasonable then buy it. They're not makin' too many 66 Novas these days! If you like it a lot, you'll have it a long time and if not, then trade or sell up.

There's really very few "bad" cars, but a lot of mismatches between a car and it's owner. I'm a Chevy guy myself and I have a lot of respect for Ford and Mopar owners - just don't happen to want to own one.

Post a few pictures and lets us "ogle" it a bit, eh?

Regards and Welcome to Club Hot Rod!
Glenn