Thread: Part Identification Chevy Big Block 454

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The oil pump drive begins at the crankshaft. The crankshaft is connected to the camshaft by a chain drive arrangement which drives the camshaft at half the crankshaft speed. There is a gear that is ground into the rear end of the camshaft that engages with a similar gear that is located on the end of the ignition distributor. As the camshaft turns, the camshaft also turns the distributor shaft. The distributor shaft has a drive arrangement on the bottom of the driven gear which mates up with an oil pump driveshaft (the part you asked about) which drives the oil pump gears which pressurize the engine oil and allows the motor to operate on its bearings. The other end of the distributor shaft is fitted with a rotor which distributes voltage to the distributor cap and then through wires to the spark plugs.

Crank up this video and fast forward it to 3:15 and start watching. It will show you the oil pump intermediate shaft that you asked about and where it goes in the motor. This video is about a 350 Chevy, but it is the same arrangement on a 454 big block.
https://www.youtube.com/watch?v=nmR--EYH4TQ
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