SBC question ..what size bolt?

Joined
Feb 1, 2002
Messages
639
Location
Utah
dumb question...
Anyone have a small block Chevy on hadnd that can confirm the size of these spark plug heat shield cover bolts..? see yellow circle.

I tried 1/4 " and they would not fit.. first couple threads took but got tight fast.

I am wondering if there is a different thread pitch needed?



thanks
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