I would help you out,.. but I have the same problem with the duster. This is the only weatherstrip I cant figure out. My little brother removed it all before paint,... and didn't re-install it.. I just got a box full of weatherstrip..
Triggerjay
Heres a couple pics of our 71 duster twister factory unmolested grill. It has never had paint, or been altered in any way. So I know this is the factory silver.....
Triggerjay