The headers I will look into, if BBK was not around back then then they weren't around. I was just relaying the information given to me by the man who runs the registry. He talks to Tom Solomon on a regular basis and supposedly verified this information for my car. Gears were available back then, as well as the B-cams and underdrive pullies.
This is a link to one of the '84 brochures. To my knowledge, the cams/intakes were not available in '84. But the gears and underdrive pullies were:
http://www.mustanggt.org/photopost/d...nAmerican2.jpg
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