I don't get the idea of lifting more in the front. I'd want equal lift front and rear or, perhaps, more in the back. The difference in approach and departure angles, especially with a hitch, is often problematic. I'm always dragging my butt around. It's not usually a problem as the hitch is indestructable but I've already squished the tailpipe a bit when the butt dragged at an angle. Forget backing out of a ditch that used all of your approach clearance to get into unless you want to plow a nice furrow to plant some summer corn in or somethin'. Also, I'd like to carry a fair amount of equipment back there at all times. I don't have much weight in there now, but apparently it's more than the average person 'cause when I've measured other 4runners to check out the height compared to mine after installing 32" tires (haven't been busted yet), I'm about .6 to .7" taller in front but always about the same in back.
So considering the performance reasons only, why more in front?
Most people want more in the font to level out the appearance of the truck. As it sits stock, the back end is higher, so they are just trying to level it out. Even when I had my 1983 SR5 I put more lift in the front than rear to make it sit level. If I remember correctly, I had 8" in the front and 7.5" in the rear. Since I was running 38" tires, I didn't really have any approach and departure angle problems.......
One thing you might want to consider for your exhaust is to have it cut off and turned out to the side. I did this, but it was just because I didn't like the way it stuck straight out the back. The way it looks now, there wouldn't be any clearance problems.
Most people want more in the font to level out the appearance of the truck. As it sits stock, the back end is higher, so they are just trying to level it out. Even when I had my 1983 SR5 I put more lift in the front than rear to make it sit level. If I remember correctly, I had 8" in the front and 7.5" in the rear. Since I was running 38" tires, I didn't really have any approach and departure angle problems.......
One thing you might want to consider for your exhaust is to have it cut off and turned out to the side. I did this, but it was just because I didn't like the way it stuck straight out the back. The way it looks now, there wouldn't be any clearance problems.
), I'm about .6 to .7" taller in front but always about the same in back. 
