Not Ranked
Seriously, buy this book.
http://www.themotorbookstore.com/howtorebifoe.html
It has good descriptions of all the FE heads, except the SOHC. Tunnel ports flow the best of the original. Modern FE heads are based off of the MR and HR design, but with redesigned ports on some of the heads for better flow.
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"After jumping into an early lead, Miles pitted for no reason. He let the entire field go by before re-entering the race. The crowd was jumping up and down as he stunned the Chevrolet drivers by easily passing the entire field to finish second behind MacDonald's other team Cobra. The Corvette people were completely demoralized."
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