In the late 60s I street raced a 64 Impala SS (an aerodynamic brick like your 55) with a 327 (originally a 300 HP), Muncie M-21 four speed, 4.11:1 positraction differential and M&H slicks.
The engine had ported and polished Mondello 2.02, 57 CC heads, a Crane SS 330 cam (more cam than the oft mentioned but rarely seen 327/375) with associated hardware, an Edelbrock C36 2x4 intake with 2, 500+ CFM AFB carbs, TRW 12.5:1 forged pistons, Doug Thorley headers, Mallory ignition, my own homemade cold air package using a 409/425 air filter and 2 6" inlet tubes to very large air inlets below the bumper. Though never dynoed, the engine likely produced in excess of 450 HP at around 7,000 RPM.
I routinely shut down 396 Chevells, all GTOs, Road Runners, Super Bees, GTXs, etc. I also took 3 out of 3 from a 69 Mach I Mustang with 428 SCJ and 45?:1 Detroit locker differential.
The engine made HP to 7,500 RPM and I power shifted at 7000 RPM. There is NO WAY that that car would approach 150 MPH reagardless of gearing.
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Today's Featured Article - Adding an Hour Meter - by Steven Gussey. This article tells how I added an electric hour meter to my 1942 Farmall H after rebuilding it. I wanted to keep an accurate maintenance schedule for my rebuilt engine and the implements I use with my tractor, but the H was never available with a tach
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