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Is this in doubt? I have done it several times at the track. Even a few very mildly built 340s have gone down before (and yes, they were stock compression and with mild cams like mine). I haven't had too much trouble with stock big block b bodies (383s and 440s, 4bbl). Its not just motor power, its how the car is set up, suspension wise. I have worked a lot on my rear setup for the track.
I have owned 11 second cars before myself and yes they were quick, but it is not to say that a 273 or 318 powered car cannot win races. When built to the same level as other small blocks of the era that are similar in size, it is very possible.
I can't understand why certain folks in this thread are bashing guys here who are trying to take interest in something that is very legitimate.