The original Hyperpak package used the long runner aluminum intake with an AFB carb, cast iron split headers, and a Racer Brown cam package among other upgrades. The original cast iron exhaust headers and Hyperpak intake are virtually impossible to find. Doug Dutra had some reproduction Hyperpak intakes cast before selling the molds to Clifford. For the exhaust people use the Clifford shorties. Racer Brown might still have the cam specs. Here is 1 style of Clifford shorties:
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Here is a Dutra Hyperpak with a set of Clifford long tubes for an early A with power steering. I was mocking it up to see if a Sanden AC compressor would fit - surprisingly it does!
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A better look at the Dutra Hyperpak
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Most people tend to use the Offy or Clifford 4 barrel intake.
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