Ok, maybe I am missing something, but what makes the P-port expensive?
All you need is a set of housings, some aluminum-ceramic or Devcon and a hole-saw.
Then you can fill your side ports with iron-ceramic or Devcon and you have a P-Port.
I doubt that you would need a 2-piece Eccentric shaft, etc. for a 250 WHp build.
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1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers)
1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)
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