$21,000. 1975 Plymouth Duster Race car. 360 Magnum Built by Watson Ruppel Performance(WRP). 650 Holley. 727 manual valve body(Forward Pattern). TCI convertor. Mini Tubbed. springs moved inward. All Metal. 4.10 gears in 489 case 8 3/4 rearend. Painless wiring. Street/Strip Racing Engine 360...