CKVortec
Indian name is "Walks on Knuckles"
Was there a reason that you changed the whole distributor rather than just the cam sensor? that's all there is to the distributor other than bearings and somewhere to attach the cap and rotor.I skimmed over this, so I apologize if this has been asked or done already. Have you tried the distributor itself? On both of my 400s, they both developed a wonky misfire. Changed plugs, wires, cap, egr, etc. Didn't do anything. Had it hooked up to a really high end scanner and it showed the misfire was coming from all cylinders at different times. Changed the distributor and ran like a Rolex watch after that.
I plan to swap out the sensor next since I have an old one on the shelf (I have a bunch of spare parts)