If it is a 364, 401 or 425 you are in luck. Ta Performance has headers. PAE can have the square bore intake milled to fit Holley carb, or Edelbrock Preformer series square bore carbs will bolt up without modification to the intake. Stock Quadrajet and 2x4 intakes can also be found. MSD and Mallory make aftermarket ignitions, and HEI conversions are available fron (my favorite) Carmen Faso 716-693-4090 and Dave Ray (ignition Man). There are a few good Nailhead porters out there like Greg Gessler (Gessler Head Porting) and Jim Burek (Pae). Cams can be had from TA Performance, Poston Enterprizes, Kenne Bell, PAE and Carmen just to name a few. Maddog Racing has a forged lightweight piston for the Nailhead. That should give you a start!
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