If you don't want NOS, they are reproduced. Here's one of many on eBay. My original was cracked and leaking and I thought about getting a used one but I worried a used one would just crack or break too since the plastic seems to get brittle after many years in the engine bay with those temps...
Which year is your Duster and which booster does it have? My 72 Dart has a dual port check valve. Classic Industries sells one that looks like mine
Here's mine:
I found a combination that works for the wheels I have, which are posted above. The beauty rings I used are also posted above. The 3" deep dish could use another 1/4 to be tight to the spokes but the 2.5" are perfect on the front. Either way, I'm happy with the look.
Rear
Front
If you are talking about the one that is triggered by the brake pedal, then step 1 is get good at being a contortionist. It's a PIA to get to. Luckily, I had my front seat out when I needed to adjust mine and could lay on the floor.
As others have said. Speaker cloth. I bought some at Joann fabric and used industrial hot glue to attach to the underside of the dash speaker vent. covers up being able to see down in there and keeps things from falling into your speak cones.
Thanks for the help everyone. I switched my lever from 3 to 1 and that fixed it! It’s shifting into and staying in each gear Starts only in park and neutral!
I am finishing up the last few items in my build. One item I have left to resolve is the gear shift lever travel. I have a 1972 Dart which originally had a column shifted 904. After installing a 727, I was not able to get both park and drive 1 no matter how I tried to adjust it (I'd have park...
I put his photos in the thread I started. This way future people looking have a reference.
Here’s the thread:
1972 Dart trunk & hood "DODGE" emblem placement