273 to 340

Vinnie said

Do you think I can use a 273 water pump on the 340 timing cover? I’m planning on using all the pulleys and brackets from the 273, but not the damper.

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What year is the 340 you are using? 68/69 will have the timing marks on the same side as your 273. If you are using a later model engine, the 273 water pump makes it difficult to read the timing marks.