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I have an 89 305 Chevy engine which came out of a K-10 pickup and onto a 36 Chevy sedan. There is a rattling noise which sounds like it's coming from the front. It's using the original steel accessory bracket in front of the engine which GM had an issue with them cracking so I don't know if that is related.
Does anyone have an idea of where it's coming from? Thank you.
Here is a video of the noise and the engine running -
https://www.youtube.com/watch?v=-sQwHc2cheU
IMO its water pump or A/C compressor. Turn on A/C and see if it changes. Look at WP and see if it is wobbling.
I couldn't really hear it in the video. But, an easy test would be to remove the drivebelt and run the engine.
If the noise goes away - you'll know it's an accessory, water pump, A/C compressor, Power steering pump, alternator....
Simple to do and once the belt is off you can spin by hand the pumps and alternator - you may feel a problem there.