Not sure about the length (mine are in a zip-lok bag somewhere in the shop) but the style of the darker one with the unthreaded narrower diameter portion at the top is correct.
The shorter one may be long enough as a carb-to-intake stud, but reminds me more of the air cleaner wing nut stud.....
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Tim in NSW, Australia
1969 Van Nuys 04A Z/28 from Clippinger Chevrolet.
Cortez Silver with dark blue interior.
Ran at Lions Dragstrip and Pomona Raceway, with paint by Bob Kovacs of Fresno.
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