I am a click away from purchasing 20' rims from a reputable seller on ebay, problem is I'm a bit skeptical on finalizing my order. I searched my recommended tire size already from tirerack.com (255/35-20) and liked the way it looked, but I still have unanswered questions: (1) The rims I wanna buy have a 38 offset: will this look normal, or like stock?(I dont want them to look "3-D"-like stickin outward). (2) The bolt pattern is 5x108/5x4.5: will this fit on my car w/o making adjustments? (4) Will ANY of these numbers fit my ride? (3) And speaking of bolt pattern, does it matter? or is there a website where I can find "eligible" bolt patterns for a 2004 Chevy Impala?