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Discussion in 'Original Drivetrain Topic' started by zfool, Sep 16, 2018 at 12:39 AM.
anyone know the approx years for each style?
The one I have are flat topped , with a M , or nothing at all 1971
The ones on my 70 are flat top with a (D) on them.
Pretty sure those are cover bolts for the finned aluminum covers.
4 of mine look like the one on thetop.
4 of mine have lockwashers and have a F in a circle with 3 spokes from the circle. I think those go with the spark plug wire clips.
I thought the aluminum ones were just a little longer ?
Maybe timing chain cover bolts?
I can't see how long they are.
Valve cover bolts for the aluminum covers are 1 inch long and have the dished heads.
For the stamped steel covers they have flat heads and are about 9/16" long.
My 73 has all the bolts with the R in them
They are all 302 z28, LT1 and L82 aluminum valve cover bolts. Possibly 69 350hp vette had them too. They were always hard to find. Lots of valve covers and few bolts. I wonder how many variations there are.