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Old 03-30-2023, 09:25 PM
Lynn Lynn is offline
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I don't think the large threaded hole above the freeze plug is for the zbar. The machined surface just in front of the oil filter area is one of the pivot locations. Most BBC have another one on the other side of the filter area (right next to the bell housing flange).

Check and see if that larger hole isn't pipe thread.

I could be wrong. Been a lot of years since I worked on a BBC.
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Old 03-31-2023, 12:09 AM
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'67 427 Corvette...

The hole in question is a 1/2x13 threaded blind hole.
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