'05-'11 Lariat wheels on a '00 Excursion?

[porgyiii]

I have a 2000 Excursion, 2WD with 4" lift. I am looking at putting on 18" Ford wheels from the '05-'11 F250/350 series Lariats. Two questions:

a. Is the offset going to be an issue? I am having trouble finding specs on this wheel, and want to make sure that if I throw a 275/70r18 tire on there I will not create rub.

b. Can I put 4WD wheels on my 2WD? Can I simply purchase a hub cover for the front wheels?

I'm new here so thanks in advance for your help...

[AlwaysStrokin']

The offset is a lot different. I think you would have to run about a 2" hubcentric spacer to make them work. I thought about putting 20" lariats on my truck but haven't come up with the money for spacers and I don't want to pay for the higher expense in tires. But I want to say the 03_7.3Turbo have put the newer 20s on his truck with no spacers.