It will all turn yellow over time, even the high temp stuff. I had one I cleared and never put on a engine turn yellow after several years in the garage!! Most people paint with aluminum colored spray paint.
Got a thread gauge and/or a set of taps and dies? Pair of calipers? Measure the hole and/or bolts you have. Figure out the diameter and thread pitch that you need and source the right size.
The hood and fender are toast. I’d start taking it apart and see what else is tweaked. You will likely have to replace the radiator support and possibly the inner fender well and possibly straighten or replace the frame rail if it is bent.
It should be on both fenders but not 340 cars. Those just had the Pentastar on passenger side and the Valiant badge on both sides above the Duster 340 decal
Here’s rough dimensions on my two fenders. I believe they are both 1970. The red one came from a member in Detroit and the green one is from Lee Robinson on here. Let me know if you need better or more pictures.
ABS was a poor material choice, but was about the best at the time. So many better plastic materials out there now. Too bad tooling isn’t cost effective for someone to re-tool
Could be. Clutch fork pivot goes inside the bellhousing. Obviously won't be needed with an automatic tranny. Same with the pivot ball. Looks like the parts on my 70 Duster. Tranny in mine is out of a 68 Dart.