I may be late on this thread as I just joined the group. The Plymouth Indy engine pictured is a 320 cubic inch using Westlake heads. It was not a DOHC as posted. My dad was head R&D at Keith Black and worked with the late Pete Hutchison. Various engines were built for Trans-AM, drag racing and Nascar. My dad and Bob Torarzzi who was contracted through Chrysler to work out of KBRE to do developed all things Mopar, including big blocks, Hemi, D5 heads and the various 305 small block engines. In 1971 due to rule changes in Nascar, running a "Winged Car", Bill France required all engines to be 305 cubic inches. Mario Rossi stuck a 305 based off the Trans-Am engines used by Sam Posey and the AAR Gurney team in his # 22 1969 Dodge Daytona. They nicked named the engine "Lunchbox" because it was so small in the massive Daytona engine bay. In the race Richard Brooks took the lead five different times before getting knocked out by Pete Hamilton. The Daytona placed seventh in the race after a long pitstop. The main difference between the Trans-AM engine was the dry sump used on the Rossi Daytona. Brooks reported it would run 10,000 RPM's down the straights. I'm currently in contact with the late owner's son on the cars restoration. Much help on my research has come from Bob Tarozzi...He confirmed all of this on the Rossi engine.
Youtube the 1971 Daytona and you'll witness how well the little engine ran. It needed a draft as it quit did not have the power to lead...if only it hadn't spun out!
The Plymouth 320 Indy engine did win at Dover. And yes it's true that Granniteli poured cold STP in the oil tank and caused a drop of oil pressure in a practice session. The engine was then air freighted back to KBRE where my dad mounted it up on the dyno and the engine still had great oil pressure...my dad wasn't very pleased a AG to say the least. My dad retired from racing in 1972. Both my dad and KB started KBRE out of Keith's garage in the fifties...it was briefly named Black and Sykes Engines after my dad left Clay Smith after Clay's death.
Some photos of my dad preparing to run an injected 305 and a Champion Spark Plug ad on winning Dover in the Westlake 320 Plymouth. Enjoy!
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