In the first picture, you posted TM34mm carbs, aka flat slide.
In the pictures of the engine in the frame, you have different carbs. Which one comes with the engine?
As for the engine, honestly it looks like shit. It is dirty. This makes it hard to sell. The other issue is it is only a 392, most people like 421s.
It could be a long rod stock stroke crank, but only way to know 100% is measure the rod.
When you try to sell, try to clean the engine up to make it less dingy. Might be able to get $1500, but I am thinking $1200.