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When I look at parts in the Summit catalog, a lot of times it will state for pre 76 long water pump motors, or 76 & newer long water pump motors.

My motor is a long water pump, but I don't know what year it started out as...

I assume that I can look on the block somewhere - where, and is it visible while in car, etc?

>>>Rod<<<

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>>>Rod<<<
A.C.E.S. # 2894
Team Chevelle #115
 

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It's the way the power steering pump bolts up, threaded or through hole.
Harley
 

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Behind the alternator where the cyl. head meets the block there is a flat spot where they stamp the I.D the 2 or 3 letters are what you need to identify what it is.

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Scott
 

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Rod,
The blocks really are not different, just the water pumps. If you know you need a long water pump, then get a long one.

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Bill Koustenis
Advanced Automotive Machine
Waldorf Md

1971 Heavy Chevy - original owner
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66 El Camino 57 Chevy pickup 2004 Tahoe
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Ther's at least two different long water pumps, one has the power steering pump mount hole threaded (3/8x16), the other has a larger diameter hole with no threads, a 3/8" through bolt goes through and threads into a nut (3/8x16) welded onto the P/S pump bracket.

Several times I've ended up drilling out the threaded style for the through bolt. Sometimes the cars don't have the right year brackets on them.

Tom
 
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