9’s up front realistically means 18’s or extensive fender work.
17x9 +0 won’t cut it. A 9” wheel up front realistically needs almost 6” of backspace to clear the fender (on a 73+ set up), a +0 is only 5” so even if you’ve got an extra 1/4” vs a standard 73+ set up that’s still no where near enough.
The problem is this- you still have the same clearance issue to the outer tie rod. Typically that’s an issue at around 5.6” of backspace with a 17”, for you that means it’s gonna be an issue at around 5.35”. So yeah, the 17x9 +0 for you is like an effective 5.25” of backspace compared to a 73+ brake set up, but you’d still realistically need close 5.75” to make the wheel actually fit in the fender, but that won’t clear the tie rod.
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@mosleyme said, you have 17x8 +0’s on there now, your best bet is to measure the distance you’ve got from the outer tie rod end to your current wheel and take most of that distance and add it to the backspace of your current wheel to figure what you want on the next set.
And think about it this way, 17x9 +0’s will stick out an extra 1/2” compared to your current 17x8 +0’s. Centerline is the same, wheel lip moves out a 1/2” on both sides.