You're going to be in a niche market with a niche buyer.

With only the pics shown, alot of non original parts and paint, but very clean. You also have a lot of panel repair and replacement.

What does it read on the cowl tag as far as options? If a 326 HO or a 400 car, power top with alot of options, you may see some more money.

I say around 12-14k. To the right buyer, probably 3-4k higher.

You should also realize we can't see panel fitment, paint condition, flaws, undercarraige, bumper fit, hear engine, see interior etc. With detailed, various and numerous angled pics, would I venture a different estimate.