Did the junkyard give you the vin of the truck that the motor came from? Sometimes the junkyard will include the vin of the donor vehicle on the receipt that they give you. If you do have the vin of the donor truck, the eight digit of the vin will tell you which motor it has. If it has a U, that's the regular 3.0. If it has a V, that is the flex fuel 3.0.
If nothing is on the receipt, double check the original ad that you purchased the engine from, if it is still valid. Sometimes the junkyard will list the vin number on the Ebay listing.
If you don't have the vin, then there is usually a sticker on one of the valve covers that lists the engine information on it. On my 2003, the sticker is on the driver's side valve cover, on the front face of the valve cover behind where the A/C compressor sits.
-2003 Edge Lowlife
My soul is empty and full of white girls