1/2 ton suspension swap - What wheel specs?

[Rat66]

Hey guys. I am needing some specific info on wheel offset/specs. I am getting ready to swap out the suspension in my 66 C20 Fleetside LB with the suspension out of a 72 C10 LB. The new suspension in a 5 on 5" pattern. I am planning to bag it and drop spindle it so I am needing to be sure the wheels and tires tuck/turn correctly.

Can someone who has done this swap before help me figure out exactly what setup I can use? I am leaning towards the Wheel Vintiques Smoothies or Rally type. I am thinking between 15-17" wheels. I would prefer the larger wheels to help fill in the wheel well more.

I am needing to know what sizes I can use and what offset.