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For the front you won't want to go more than 9 inches.
+32 offset isn't bad, a +35 would be better...but you have to consider what tire size you're gonna use.
For the rear you could go up to 10.5 inches...but you'll need a +45 offset at least. With a 10 inch +38 you might(probably) get rubbing on big dips/bumps...once again, depends on tire size.
Ideally with the 10 inch you wanna be about +42 or more.