Differences in timing covers?

I think i've still got one for a 67 318 if you want it. I had to swap it for a newer one to fit the water pump and radiator in my 73 duster. Actually ended up being a total pain in the ***. If I remember correctly they're a slightly different depth as well. If you switch the water pumps to fit the timing cover/timing marks then you will have to get a new radiator or do some fancy hose routing because its just different enough to screw everything up.