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1. Who knows, could be a jet problem or a bad guide, how far down are you planning to go?

2) Do you mean the line up on the shock crossmember? The plating process involves an acid dip to completely degrease the part and remove old coatings-- it's not perfect but it should help clean inside. Electroplating doesn't work very well on the inside of tubes for some reason, so I wouldn't expect it to plate internally, but it might. Just make sure there is no rust.

3) Can you get a Pertronix for a Marelli? I thought only Bosch. Anyway, I would be the other way around-- keep the points and check the Permatune, they often go bad, including the old ones. A new MSD works great or the OE Bosch CDI is a time-proven winner. The Pertronix is claimed by many to eliminate points bounce and spark scatter.

4) Painting coil OK. Powdercoating not OK, the heat will destroy the coil. You probably have a Permatune coil anyway so don't bust your pick if you're going to change to MSD or Bosch.

5) The manifolds are magnesium, covered in a black epoxy finish. Are they in poor condition? Removing the coating is VERY difficult and you are likely to find corrosion in the magnesium substrate.

Good luck and keep the photos coming!