It can be done but a pain. I just fit some 01's to my 99 but it took a while to work out the bugs.
Here is what I did.
1. Remove rear tires and start truck, put in first and let the hub go round at idle (make sure you have a lugnut on) and take a 10" grinder and grind away at the rear lip. I had to remove about 3/16 of an inch to get them to clear, this was not fun.
2. On the front, the tie rod ends have a metal cap on then that cap the rubber dust cover and this must be removed, if you just grind a little away the cap will turn and start to rub on the rim. Also you must remove a little of the tie rod end housing with a grinder to get the rims to clear. Last you must make sure the lip of the rim does not hit the tie rod when you turn full lock.
Would I do it again, I dont think so but after so much time and effort it was a pride thing.
PS When I weighed my steels with 245's and then the alloys with 265's, guess what, same weight.