Are dart sports mostly gone

I own a 1975 dodge dart sport 360. It's my 1st car!! I know have had for give or take 19 to 20 years. Started as a 318 car. But was missing all drivetrain. Just a shell @ a junkyard. I immediately saw the potential so I had to have it. My dad knew the owner and asked about it however someone else had already given a down on it! So time went on my dad went back for parts for his customer cars (he was a mechanic). So he realized dart was still there. He asked why it was still there they said the person who gave a down never came back! So he was able to convince them to sell and they agreed. It became my car. Or my shell lol! My dad had a totaled dart slant six. We removed its guts to use for mine just a reseal and rering. Ran ok but never was happy with a 6. As time went on an uncle happened to have a 1975 chrysler Cordoba 360 just sitting. I convinced him to sell it to me. My father and I took its guts and did a proper rebuild I found some 340 X-heads and used the mopar 280 cam. I still have it today!!