the individual pieces available are made from one specific pattern from one specific year, so using them on any particular cab will take 'fitting' the same as it did in the factory, those patch panels [made by the same company] probably would be as much work to fit to a new cab .... the new cabs, being already complete, just have to fit on the frame and bolt up to the front sheet metal, which is always a job .... for the price I really doubt you'd find anyone here in 'hobby land' that's bought one to 'restore' their old truck, they're aimed at the custom rod builders that spend a hundred thou on a truck
Bill