Your 122007 and 120229 numbers are definitely 5/16-18 hex head bolts. I couldn't find a reference to 122017 in the FAM. If you'll let me know what page you're looking at I can track down the diameter and pitch for you.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.