Mystery parts, Big Block or 6 cyl?

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**KevinW** · #1 01-29-2021, 07:30 PM

I have been digging in my bolt pile, gathering/organizing bolts for my two SB builds and found these. I have never had a BB or 6 cyl, so I am not sure how I got them, but they do not look familiar to me. Thx for any help!

ps, I know the valve cover spreaders on pic top are SB, but not sure about the lower ones.

**RobR** · #2 01-29-2021, 09:46 PM

Fairly sure they are used on big block Chevys

**AnthonyS** · #3 01-29-2021, 10:36 PM

Yep, BB hold downs.

Check that long threaded alternator bolt for a "W" stamped on the head end (short thicker thread side of the hex).

**KevinW** · #4 01-29-2021, 11:30 PM

Thx, no W stamped, but has an X or cross stamped in the end.

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