MY DUSTER THAT I HAVE BEEN RACING SINCE 1973. i HAS STOCK CARBURATOR AND INTAKE MANIFOLD, STOCK HEADS MILLED TO STOCK CC'S, AFTERMARKET PISTONS AND A .050 OVER SIZE, RITTER BLOCK, STOCK LIFT CAM WITH MORE DURATION, 5200 STALL CONVERTER AND A 4.88 REAR. IT HAS RUN A BEST ET OF 10.38 @ 126 MPH...