"...So after a couple days worth of talking, it's likely I won't make the deal for this '68 Firebird I mentioned. I'll still be interested if another similar car comes along."
I have no idea of your budget or EXACTLY what you want in a car. But here's a decent lookin Pontiac powered '68 Bird.
https://www.racingjunk.com/Complete-...=1&from=search
Here's one with a Camaro glass front, less engine.
https://www.racingjunk.com/Door-Cars...=2&from=search
You like green ?
https://www.carsforsale.com/vehicle/details/274853
Not sure exactly what this is.
https://www.racingjunk.com/Door-Cars...=3&from=search
Here's an sbc powered '67.
https://www.racingjunk.com/Door-Cars...10&from=search
Here's a cheap '67. Don't know if the ad is legit or current. Probably not.
https://cars.trovit.com/listing/1967...e.S1sQII181D1X
Here's a '69.
http://topclassiccarsforsale.com/pon...-race-car.html
Wanna build something really cool ? How 'bout a '63 Lemans ?
https://cars.trovit.com/listing/1963...t.RL_1i1wt1W10