I though about selling..now im thinking of cloning it.

I can tell you, I had a factory 74 Duster 360 4 speed car. I sold it for $3500 40 years ago. It was a super nice original car. (For the most part) To this day, I regret selling it. You have a VERY rare car, especially a sunroof car. KEEP IT! Return to stock appearing, hop-up the engine a bit, (It won't take much) & it will run pretty damn good. Mine still had the factory exhaust manifolds on it, mild engine work as in a little larger cam & that's it. High to mid 14s with street tires. It would run. They were as fast as most any 340 car.
They don't get the respect they deserve because most people think they are smog era cars, WRONG! Keep it or you'll most likely regret selling it one day. It looks like a pretty
It IS a "smog era' car. By 1975 all cars had catalytic converters installed on them. In the state of California all 1976 and later cars STILL have to pass a bi-annual (every other year) smog test (visual as well as emmisions) in order to get your tags.
There were also other federal regulations like the 5mph impact bumpers foisted on cars around that time. And compression ratios began to drop in the early 70's. So no,it wasn't a good time for muscle cars.
Most of the smog junk can be taken off now as most states have exemptions for classic cars,but it will always be a smog era car.