1965 273 Intake Bolt/Washer?

cudamark said

'66 didn't use any washers, and IIRC the '65's I used to own didn't either. 2bbl and 4bbl used the same bolts.

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FWIW, the '68 273 I just took apart had captive washers on the 3/8" intake bolts. I don't believe that engine had ever been apart.

I'm really thinking that the washers were added on my '65 by someone when the intake was off.