Late model offset wheels on a 68 C-10 LB...Anyone?!??

[PONYKLR]

Has anyone come up with a works/no works guide for this situation?? I have a STOCK suspensioned C-10 that I'm just trying to get running right now. It needed wheels/tires and I found a set of 18" billet wheels at the Fall GoodGuys GTG for CHEAP, but now I'm worried they won't bolt up. Specifics are 18X8 w/5.5" POS. offset, 18X10 w/6.25" POS. offset. A friend of mine is concerned they may sit so far into the wheelwell that they might hit the control arms/trailing arms. Without actually hauling them out to where the truck is stored right now and actually fitting them on it, I'd like to know if I'm going to have problems with these. Be kind, I'm a C-10 newb!!

Tim