New Member with a Question

Hello everyone, I've been lurking here for a while but now I have a good enough reason to register. Four barely used '08 Tundra factory steel rims and the Bridgestone Dueler X/T 255/70-18's that come with them have made themselves available to me for a couple hundred bucks. My '04 taco came with the shitty 205/70-15's and I was wondering what you guys might think about doing the switch. I know they won't fit w/o a small body lift(3"?) and lug adapters to 6x5.5. I'm not sure if they'll look right after this without any plastic wheel flares either. So I want to hear any ideas you guys may have, I'm trying to do this as cheap as possible. Do you even think it's worth my time to attempt this?