Issues with pre - 70's 318 in a 73 Duster

So here's an interesting twist.... has anyone actually tried putting the newer style water pump on the old style chain cover? Despite the differences, it looks like it would actually work.

From what I can tell, all the brackets mount based on the water pump design. So that would resolve both my issues. Worth a shot? Or am I missing something?

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If you put the new water pump on the old style chain cover, the timing marks will be blocked by the lower radiator hose outlet on the water pump.... :mad:

You won't be able to time the engine... :BangHead:

You have to keep the timing chain covers and water pumps for the early and later engines together as a combination... Mixing and matching will block the timing marks...



Ok, here it is:


Here is the early style 64 - 69 location with the timing tab as on the 64 - 68 models:

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Here is the 70 and later configuration...

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Here they are side by side with the early 64 - 69 location on the right and the 70 and later configuration on the left...

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Here is the 70 and later timing chain cover with the 64 - 69 cast iron water pump on it...

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Here's a side shot of the 70 and later timing cover with the early 64 - 69 cast iron water pump from the side... The radiator hose outlet blocks the timing marks for the vibration damper...

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Here's the early style 64 - 69 timing cover location with the 70 and later aluminum water pump... The timing tab will not seat properly as it interferes with the lower radiator hose outlet....

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Here's another angle....

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Here I put the timing tab under the water pump to simulate the 69 timing cover with the marks cast in... The vibration damper marks will also be blocked by the lower radiator hose outlet...

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If you want to do it right, keep the timing chain covers and water pumps together for the early and late style configurations and make a new mark on the old vibration damper that came on the engine that you are using....