Backspacing

[David67]

Hey I've got a '67 stepside shortbed and I'm looking at wheels and what will fit. I am planning on running 18x9.5 in the rear and 18x8 in the front and was wondering what the limitations would be for the backspacing because I know it might be a tight fit in the back with a 9.5" wheel. One of the wheels I'm looking at is the American Racing Torq Thrust II and they have a wide variety of sizes and was wondering how I could figure out a min back set and max that I would need. The other wheel I'm looking at is the Coys C5 and they only have the options of 4 or 4.5 in the front and 5 or 5.5 in the back. And if anyone is running a similar set up pictures would be great! Thanks.