I think originally, the dished pistons were just a crutch to meet emissions standards. The Big Three using dished pistons could lower compression with the same old heads, add an air pump, EGR valve, leaned out carb, cats, and voila, they were there. Also retarded timing and high gears.
Those engines put out a whopping .5 HP per CI. I know because my '75 Granada 351W did just that. Fortunately, I was able to tweak it a little once I had figured out what they had done.
Rev
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'66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph
1/4 mi.
[This message has been edited by Rev (edited 10-06-2001).]
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