I changed engines and when I did I used aftermarket carb, Intake and Air Cleaner. Is There any market for these original assemblies?

 

Not the intake, but some on here collect the air cleaners and the carb might be useful to some depending on what it is. For instance, those that have to keep the emissions systems intact look for feed-back carbs.

So you might post some pics of what you have and also describe the truck. Year and engine are the main things, but also whether it came from CA or not as those trucks had complex systems.

 

There is demand for the original closed air cleaner, put it for sale here or on eBay, please don't throw it away. So many of these are replaced with unsuitable open air filters that allow the filter to be saturated with water and starve the engine for air. Open filters are not suited for trucks that are used as trucks and don't give any additional performance for a mild engine, it's actually likely to hurt performance if changing from a factory filter with snorkel connected to a cold air intake source such as behind the grille rather than hot engine compartment air.