Building an 85 k20 4x4 help please!

[67TexasC-10]

I have an 85 k20... it is currently lifted 4 inches on 33s.

Im running a mild built 350.
It is a four on the floor/with granny gear
approx 4:10 gears....

I would like to lift it between 8-12 inches total and wonder how perfoemance is affected from an 8 to a 10 to a 12 inch lift and also wonder what size tires can be ran at these size lifts without rub? This truck will most likely be a daily driver with most of its time spent on the pavement. But if i want to go offroad i want to know ill have a pretty solid truck that wont break so easily.... What other suggestions do yall have? all input is appreciated!!

Also I would like to do crossover steering.... I think i have determined a 10 bolt gm is up front and a 14 bolt out back. Where is a good place to get a complete kit? And can some one explain to me the differneces in crossover steering vs a high steer kit?

Thanks in advance