On my 91 454 i have in my 55 there is a small 1/8" plug in the block right beside the oil filter, I have my pressure gauge mounted in the larger hole by the filter, does anyone know would this smaller hole be plugging another oil passage?
The large hole closest to the tranny is for the clutch linkage in a standard. The hole directly above the oil filter is used in Corvettes for the electric oil pressure sender. The next plug towards the front is a water jacket drain.
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