Not Ranked
While the SOHC is the top dog the 427 High Riser heads of 1964 were a close second. Those heads were outlawed by NASCAR in 1965 and the result was the medium riser heads which became quite popular as an alternative. High Riser heads COULD compete with the Hemi. Even today a well worked set of original High Riser heads are hard to beat by ANY after market or modern 427 heads.
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