The difference is the price, i got my 2" keys long time ago off Ebay for cheap with the included shock extenders, the Ford keys are sometimes cheaper, i think there just stock F-150 keys and they can be adjusted more than the Gm ones making them able to lift your front end higher, oh and they are very easy to install,
stock wheels fit bigger and wider tires more easily than aftermarket wheels ,
you shold be able to fit a 285/70 no prob by just cranking the stock keys a little IMO, but its up to you
I don't have stock 17's (I have 16's)
i intend to go to 17's, the ones i'm looking at are 17x9 with -12mm backspacing
as far as cranking the stock Keys,
I was under the truck the other day, and they look (to me) like they are as tight as they will go. and the truck is nowhere near level.
---------- Post added at 09:23 AM ---------- Previous post was at 08:31 AM ----------
I found this writeup on the install
http://z71tahoe-suburban.com/iboard/index.php?act=attach&type=post&id=2
I guess the Ford P/N is XL3Z5B328CA
or the GM (Green) key is 155925173
---------- Post added at 10:26 AM ---------- Previous post was at 09:23 AM ----------
I've read that people found ford dealers that sold them for $20 each
I called my local dealer, $79 each
and looked online and found $58 each
where are you guys getting them? XL3Z-5B328-CA