I am thinking the reason I heard for the 64 Hemi cars was that they had factory headers. Never have heard the reasoning on the 67 RO & WO cars. The 64 cars that I am refering to are not SS cars they were street cars. I have always heard that they were ordered Max Wedge cars and became Hemi cars when they made the switch to the Hemi. There are still several around and all that I have seen are hard tops not post cars. They had the big AFB's on them not the holleys.
