I think the one I showed in the pict. was filed down , and is now too short . looks like I need one at least 1/2 " to 5/8 of threadsThere is a long bolt and a short bolt, which is correct for your needs!
NOS for $15 shipped from Ulf is an incredible deal!
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The long bolt is for '60-'62 170 engines, plus '60-'61 225 engines in big cars (Plymouth/Dodge, not Valiant/Lancer). All these use one of three different air cleaners with a flat floor. The '63-'67 air cleaners have a dropped floor (bottom of air filter element at a lower plane than carb neck) and so they use the shorter bolt.
I found a 67 like pictured