wheel question, and pics wanted

[stepside83]

i have a 1983 chevy c-10 2wd stepside, and im lowering it 3 inches in front and 5 in the back, i want to get a set of the boss 338 wheels even tho there used alot, i just like how they look on our style of truck, theyll have the gray spokes and the truck is gonna be some shade of blue, my question is will the 18x8 fit on the front, and the 18x9.5 on the rear with out any fab, im not sure on what size tires to run, because ive never had anything with wheels bigger than 16 inch, id like to get as wide as i can in the rear with again no fab, and just what fits the wheel for the front, any info, or pics of what this may look like on a stepside in the 80s thanks you