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Registered
Join Date: Jan 2003
Location: Burford, ON, Canada
Posts: 2,336
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The 1/2 or 3/4 pairing is just a transition thing, and is of little consequence by itself. However the pair is really only as good as the lower of the two numbers. What you should check is the case pairing numbers on the top where the halves are bolted together. The 3 digit numbers there should be the same on both halves to indicate that the pair were machined as a set.
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Keeper of 356, 911, 912 & 914 databases; source for Kardex and CoA-type reports; email for info
Researching 356, 911, 912 & 914 Paint codes, Engine #'s and Transmission #'s
Addicted since 1975
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