Not sure of the offsets but you can easily run a 20x10 rear with a 5.5 back spacing, the fronts I believe should be a 4.5 bs, 275 will fit in the rears no problem but I would go with a 285 if you went with a 10" rear. Be careful choosing tire sizes for the wheels so you do not end up with a front tire that has a higher sidewall height then the rear( looks ridiculous IMO)
Which wheels are you looking at?
Which wheels are you looking at?