A little special sauce for the bread and butter 318.
I get it. I fully understand the market forces behind making the 318 the base engine in the Road Runner for 1973. Understanding it doesn't mean I have to like it. Nor does that mean it was the right move to make. If I was running Plymouth my plan would be the 340 as the base motor, followed by the 360 for the 1974 MY. I would have created a Fun Runner type stripe and wheel package for 318 buyers, essentially all the visual stuff of a Road Runner without the bird decal or the beep-beep horn. If some corporate honcho above me on the pecking order insisted on the 318 I'd go the "special" Road Runner Engine route. A 318 with a cam and heads from the 340 parts bin, topped with a 4 barrel Thermoquad. That hypothetical engine should have been available all the way till the end, the 1980 Volare Road Runner.
John is a GenX car enthusiast who grew up driving classic muscle cars. He enjoys the new modern muscle cars that can out perform the classics in every way. In the sportscar world his banners are Viper and Corvette. John has a guilty pleasure. The disco era street machine. Those unloved, underpowered cars festooned with scoops, spoilers and stripes.