';i have a 1980 chevy 454 engine, at the back of the block above the oil filter are 2 threaded holes. what are these for and can i simply plug them?I have a 1980 chevy 454 block. there are 2 threaded holes at the back of the block just above the oil filter.?
those threaded holes are for a linkage set-up for a standard shift tranny.I have a 1980 chevy 454 block. there are 2 threaded holes at the back of the block just above the oil filter.?
They are oil holes. They are there for pressure check and some had oil switches there. Yes you can plug them. If you don't all your oil will come out there. Some had a hole on the block there for a ball for clutch linkage, if yours has that it will bottom out and does not need to be plugged.
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