Egr Valve

Where would I find the OEM part # for my egr valve? Would it be on the valve itself?

Yes, it should be stamped on the valve itself. What year is your car?

1989. Its 305 engine code code "E" I think. I might be wrong though.

Make sure you find either a "P" or "N" suffix with the part number. Most likely, a TBI will have a "P" suffix, but it's always best to verify.