Thanks for the imput. I've been looking around, and just from my observations, the motorcraft replacements don't seem to pull as much as the original C5OF-E distributors. NOS motorcrafts seem to be going for what a used and usually not as nice autolite or fomoco goes for. The few C3OF's I saw seem to pull a good buck too.
Morelos, thier hard to find these days, but if you can find an old garage, or maybe a guy from a car club that has one of those old sun distributor machines, they can set the distributor up on the workbench and recalibrate the advance curve and total advance. They can also set the dwell exactly. Hard part is finding someone with the machine!