Not sure where you're located Agron, but the AutoZone close to my house carries the Bosch CU core plugs. Picked up my last set for the ridiculous price of .59 each. Getting rid of the plats that were in there and replacing them with the proper CU core plugs made a difference in the way the old gal ran. If the heat range is correct and properly gapped the Motocraft plugs will do, but see if you can locate the CU core Bosch plugs (and do not use platinums, your car wasn't designed for them)
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.