Part numbers question. I am working on locating the driver side mirror. It is the two post manual. I have come across two part numbers that look like what I need. 2299574 vs. 2299521. What is the difference between the two and will the 521 work on the 66 Dart? I think the spacing between holes may be the same. Also how can I tell if it is OE or aftermarket? Would the part number be missing? Any info would be greatly appreciated. Thanks.
Also is there a parts numbers list somewhere. I could only find a book that was $300 - yikes!