First thing to do is have them baked and magnafluxed to make sure they are ok .

If they pass that test, bronze guides , new valves and hard exh seats . If you go to the larger size valves there is a minimum amount of bowl/port work that must be done or there will be no increase in flow from the larger valves .

If the guy is not well versed in mopar iron heads I wouldn't take them to him , you could end with something WORSE than what you start with, been there , have the shirt .