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So what size did you go with 3.5 or 4.0".
i'll make the call tomorrow. thanks



Keith, I bought 3.5" studs to use, but I decided to counter sink the nuts into the water pump housing and ordered 3" studs with the reduced wrenching 12 point nuts and flat washers. Mine is a older CSI water pump and a .250" alum engine plate.
Brian