Vice Grip Garage’s 1973 Plymouth Duster is losing its famously indestructible slant six and weak 904 automatic, but what Derek drops in their place isn’t the Mopar-correct choice anyone expected. A 351-based stroker, paired with a heavy-duty 727 TorqueFlite, sends this budget-performance fastback in a direction that’s already sparking debate among Mopar loyalists in the comments. Longtime fans are also reminiscing about their own Duster and Dart memories along the way. See exactly what Derek chose to build this Duster around, and why it’s dividing the Mopar faithful.