I don't think it is recommended but I have seen it done, the wheels are 16x8" (American Eagle 143's).

Is our lug pattern 5 on 5 or 5 on 135mm?

It's 5x135mm.

Thank you.

you could look at it this way... $1400 for new gears installed or $1500 for a rebuilt tranny that you put in.. i ran 35's in my 99 for 120K+ with no problems and i have a friend doing the same thing in his 99 at 80K+ both of us had 3.73's and the 5.4! There are no hills here!!! It's all relative! But if you have the $ now, the safe thing would be to swap gears to 4.56s, that will leave you with gearing if you want to run bigger tires later.