70-72 non swinger

Sounds like Duh-Star is a good contact!! If you do not find a project in your back yard, I suggest you willing to pay shipping, especially for a solid project or the right driver or done car. Vinyl top cars, be advised they all rust!!!!! Last Demon I had was bout 2005, the roof rails were gone, rest of roof was just surface rust, that was 20 years ago and an Arkansas car.
He is right bout 340 they have most all been rode hard, bored completely out, NICE to have the real deal, but any Demon/duster can be made great with a good 360. You can maybe even be happy with a righteuous built 318!?
Good luck, keep networking, yo will find the right car ... persevere!