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Is there a difference in the water pump flange bolt pattern from a 1968 big block water pump to a 1969 big block water pump? I have a GM clutch fan that I took off a 69 big block and a guy is wanting to buy it to go a 1968 427 in his Camaro. I know his 68 has the short style water pump. I don't want to sell him something that will not fit. Any help would be appreciated.
 

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The clutch fan for the 67/68 short water pump is different then the 1969 long water pump. I am not sure what the actual difference is.
 

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Discussion Starter #3
I managed to answer my own question this time :hurray:
I found an original 1968 396 water pump in my junk building and measured the water pump flange bolt pattern and it is 1.175" vs the 1969 is 2.125".
 
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