fixed that confusion.
he is suppose to be taking pictures with a tape measure in them to see exactly what it is. Like I said before, I don't know everything, but I have done a ton of these specs for people and haven't had a problem arise so far.
here is stock axle with the least amount of front spacing you can run to be inside the bedsides.
this is minimal clearance. 7" in the rear
these wheels are 24x9.5 +25mm offset (4.25" front spacing)
OP's wheels are 24x10 4" backspacing (7" front spacing), by his specs
there for the difference is 2.75". add in the fact he is running a 295/30 on them and he wants to be 8" in the rear.
I just state 3" minimal for the rear. its up to him to decide how much actual clearance he wants to have and what he wants to trim.