1... how much does it differ i.e. are parts like springs and shocks interchangeable?

2... how different are the spring and shock mounts on an air ride rrc and a coil sprung rrc

why im asking, i want to try and put air ride on my '99 disco 1, i would be using an aftermarket air ride compressor, controller ect., ect........ but im thinking if the factory style rrc airbags will work it would be easier than having to make custom mounts for an all aftermarket setup

this isnt just to slam it down into the weeds i want to have the adjust-ability and smoothness of air ride

thanks