• Mutual exchange of properties

Suppose i own a property  say " A " which i got it from my father. There is another property " B " which is adjacent to A which is owned by my uncle (my father's elder brother). We both want to swipe the properties from A to B and vice verse from B to A for our mutual convenience. We want to save the stamp duty.

a) What are are ways by which we could transfer the properties?
b) Say if file a suit on my uncle we make a compromise decree in court will that compromise decree be treated as a Title for any further transactions?
c) Should we pay any stamp duty for registering the court decree in sub registrar's office?