Thread: New to building engines. Quick question.

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I purchased a 350 sbc that came out of a 87 Vette. After bringing it home and tearing the whole thing apart I found this "hole." It just doesn't seem right to me, however there is a similar one tucked away on the outside of cylinder 7. Thanks for any replies.

if you are referring to the unmachined hole in the area at rear of valley-its oil drain back hole so oil can return to crankcase---at the front of block drains back to timing cover area thru 2 machined round holes which oils chain/gears