Need help with H2O/front cover assembly.

Big change in all that between 1969 and 1970. The big deal is to match all the components: timing cover, water pump, harmonic balancer and the radiator and brackets. I've just been helping a guy who bought a 72 Duster with a 69 340. 69 front cover and balancer with 72 water pump and radiator - result is the drivers side lower radiator hose covers the timing marks, so he can't time the engine (OOPS!!!).