Aero and Body Mods
For the Duster the best rear mod is probably the Direct Connection type "ducktail" spoiler. I recall reading somewhere that they were getting an extra 10mph out of the cars on the road with that, but I have no idea where I read that or if there's any truth to the "testing".
This is probably the best version, its a fiberglass copy of the original DC spoilers which were ABS (and pretty flimsy).
http://www.ebay.com/itm/1970-1976-Plymouth-Duster-and-Dart-Sport-Rear-Spoiler-/111557165763?pt=Motors_Car_Truck_Parts_Accessories&fits=Model%3ADuster&hash=item19f95342c3&vxp=mtr
In the front there's a few different options, there was a DC front spoiler as well. There's also Spoilers by Randy, who makes some front spoilers out of sheetmetal for the Dusters (and other A-body's). You can also use a 67-69 Camaro front spoiler, which are pretty cheap and available in all kinds of materials (ABS, fiberglass, metal, etc).
First two are Camaro spoilers, first one is GmachineDartGT's car with a 67 Camaro spoiler and custom vents. Last two are DC spoilers
For the Duster the best rear mod is probably the Direct Connection type "ducktail" spoiler. I recall reading somewhere that they were getting an extra 10mph out of the cars on the road with that, but I have no idea where I read that or if there's any truth to the "testing".
This is probably the best version, its a fiberglass copy of the original DC spoilers which were ABS (and pretty flimsy).
http://www.ebay.com/itm/1970-1976-Plymouth-Duster-and-Dart-Sport-Rear-Spoiler-/111557165763?pt=Motors_Car_Truck_Parts_Accessories&fits=Model%3ADuster&hash=item19f95342c3&vxp=mtr
In the front there's a few different options, there was a DC front spoiler as well. There's also Spoilers by Randy, who makes some front spoilers out of sheetmetal for the Dusters (and other A-body's). You can also use a 67-69 Camaro front spoiler, which are pretty cheap and available in all kinds of materials (ABS, fiberglass, metal, etc).
First two are Camaro spoilers, first one is GmachineDartGT's car with a 67 Camaro spoiler and custom vents. Last two are DC spoilers