Hughes Engines Tech Center: Indy 440-EZ Cylinder Head Secret

While a set of ported, cast iron “906” cylinder heads might have been the pinnacle of piston-topping performance circa 1990, the proliferation of aftermarket aluminum heads over the last thirty years has turned most factory pieces into hefty paperweights. Early on in the transition, selection was slim as market appetite took shape.

Read the whole story at Mopar Connection Magazine HERE: