I have a 1997 f250 (5.4 i guess considered light duty)...anyway I have the 7 lug rims and of course they are rotting out.

Question is : are the 7 lug rims from later years (1998-2001) the same exact size / will they fit ?

 

yes. up to 2014 f150 hd's 7x150mm with 87mm center hub

 

the offset is a little different though as i've seen them on an older truck. seem to work just fine though.