Not Ranked
Both engines are good peices and will do what you want. However, I would personally pick the Cleveland because I think they look better than the Windsor.
I have had good luck with the Cleveland and have a 72 Mach 1 which I bought new with the 351C-4 barrel. 13:59 @100 mph on the 1/4 mile with no internal mods and stock cast iron intake with Motorcraft carb.
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Eddy K
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