wheel help
 

I am in the middle of building a Pro- touring truck (68 chevy) and we are at the point where we need to get the fitment someone what correct for the front and rear. Without just dropping a bunch of cash on the new wheels yet I am trying to come up with some solutions. I posted on wanting to buy section for some old wheels but am open to idea's

I am looking for 20 X10 or 12 on the rear and 19 X 8 or 10 in the front. any help or guidance would be greatly appreciated. We are kinda going for a similar look as the Roadster Shop's C-10 if that helps