i have a 2000 f150 4.6L engine and i am gonna get a new set of plugs. my problem is i am reading part #'s sp413 and sp432. i asked a tech on fordparts.com about these and he said they are wrong, but by reading on the forums i am leaning towards the sp432's. what should i do? does anyone out there know the correct part #?

 

someone must know?????

 

??