Water Pump Bolt Length

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Kilian

Full Access Member
Joined
Mar 25, 2018
Posts
200
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37
Location
Wisconsin
First Name
K
Truck Year
1983
Truck Model
C2500 on its way to a K2500
Engine Size
350
When I removed the water pump from my late 1970s 350, there were three different lengths used. Since there isn't a difference in thickness in the water pump casting, and I don't see much difference in the block, what length is correct?

Four 3/8-16 x 2" bolts?

Thanks!
 

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