Valve Cover Bolts Aluminum VC

Trying to find a solution for my Offenhauser valve covers on the 383. The stock bolts are too short for the thicker cover and Moroso gasket. The mounting surface is also narrower than the factory bolt.

I need something longer and narrower, went to the Parts store and the Hardware store and no luck. I don’t want to use the T handle type, and that’s all I can find.

What did you use?

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