All,
Ford has a new part number for the 3.0 Cylinder Head bolts. The old was 4F1Z-6065-AA, new is 4F1Z-6065-AB. The new part number corresponds to 2005+ Freestyle and 500, not sure what the change is, if any.
Oh yeah, I tried ordering various parts from 1stfordparts.com for the 3.0. They required a VIN and when I entered that this was a 3.0 conversion in the comments field the order was cancelled. Reason they gave was that they "do not support" conversions