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Tony - my own engine is "just" a 408 (4.03 bore, 4" stroke), and I went that route to stay away from the potential issues with the 427 (rod ratio etc). I am not sure how real those issues are, but being a conservative Brit, I stopped at the 408.
I do not spare the rod with that engine - it regularly sees 6000 rpm, and much full throttle action. In 9500 miles I have had no problems other than a slight coolant weep on one cylinder head.
The figures are good as well - in SAE terms, over 500hp and lbs ft.
Tractable, docile (and cool) in traffic, yet pulls like a tugboat.
I don't think you would be dissappointed going the stroker Windsor route.
HTH
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Wilf
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