Just because you have a bigger lift and a bigger tires doent mean you will do good off road. With 37s you will be really straining tires. Heck with 35s you will strain someparts depending on what axle you are running. So what axles are you running.
Thats what I said, didnt I? I have 10bolts w/3:73.
Stock axles right now (10 bolts), but i was planning d60/corp14 down the road... I just dont want to do things twice
The only way not to do it twice is to do it right the first time.
So you lift your truck 4-6" and run 35 tires on 1/2T axles = 6 lug, thats about as much as I would do.
If you want to do 8" and 37's the right way, step up to a 14BFF or D60 now you really really need to add hi-steer, possibly hydroboost, re-gear if they are not matched and buy new 8 lug wheels.
No real way around it.
My K5 with a TPI 350 5" lift and 10 bolts turns the 35's nicely as a DD and holds its own on the trails, but I dont push it.
Would I put 37"s on....not unless I was going to 8 lug set up....
...which is why I havent yet. I want to have axles-steering-tires and wheels all ahead of time and make one install...just my way of doing things