Thanks guys.
I found an old MPC 69 Barracuda kit that I had not built. Comparing it with the Duster kit, I think the Duster chassis will work under the old 'Cuda. Since they are both A bodies, it would seem a natural swap to replace the old MPC one piece chassis with the much better looking Duster chassis. I'm sure it will take some minor cutting, but I think that is the next project. I'm off to the hobby shop to get another Duster kit.
Jim