You really shouldn't be needing pusher fans at all man. The highest I've ever seen my truck get to is 201F (still well within op temps, about 115F while towing vehicles around up steep ass hills... off road with the locker/ATRAC on lol). Unless that blower's seriously bringing the temps up I don't see why it'd be necessary. Cool factor sure... but ya.
Also, as for off-roading/expo rig... You're better off replacing the clutched fan with electric as clutch fans can/will fail... and when it does it will be enough to not allow the motor to idle anything less than probably 3k RPM. That happened to my buddies Tundra and I had to tow it with my new 2008 PreRunner at the time... lulz. Plus when you blast through water and such or caking it in mud you'll risk seizing it more. Just something to contemplate.
As for the rubbing bit... I'm seriously rubbing pretty bad with my 285/75/R16's. I'm hitting the pinch weld for sure... and even if that's beat back I'm not sure I'll be clearing it... with 35's and our mid travel I'd place some cash you will still hit on full compression and wheels turned, especially if you decide to move away from the Timbren's at some point for superbumps or something else that will allow more travel distance. Again, just something to contemplate and be preped for. There's a shit ton of clearance toward the front, it's just that damn abrupt down angle on the back of the wheel wells that get in the way lol.
No matter how you do it though I can't wait to see it... who knows I might end up copying what you do haha...