the bolt headmarks for the 2 horn bolts and the 6 bolts that hold the vacuum tank on the drivers fender well should be ?
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Re: 69 horn and vacuum canister bolt headmarks
kelly-----
The horn bolts are 5/16" bolts (1/2" across the flats) and have an "E" in a circle with 3 lines 90 degrees apart (GM 275-M).
The vacuum tank bolts are 1/4" bolts (3/8" across-the-flats) and also have an "E" with 3 lines 90 degrees apart (GM 275-M). For these bolts, there is no circle around the "E".
These are the configuration of some bolts that were originally used. Other bolt head markings may have been used, too.In Appreciation of John Hinckley
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