You probably know the Grand National Roadster Show is coming up at the end of the month in Pomona. I think you said you went last year, but it's a good place to help you narrow down your likes and dislikes of various cars.
The Pomona Swap Meet is this Sunday, Jan 15, which also has a cars for sale section, where you can explore options.
There is a decent amount of aftermarket support for both classics and muscle cars, depending on your fabrication skills and the kind of project you end up choosing.

If you find a specific car you're interested in, I'm sure you'd get tons of advice & things to be aware of from the wide knowledge & experience of the guys here. Good luck. Keep us posted...