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As I am getting to know my engine I'm finding little threaded holes in the block ... these three look like they are all related and for something specific. For reference, it is rear of block near firewall ... you can see road tube and distributor is on left border. Can anyone tell me? It is a 1963 292. Thank you!
The very back (top from the perspective of the picture) is for the plug wire loom. The others are for throttle bell cranks, which I don't think are used on every application.
