Number One.

My steering in my 76 is very sloppy. My buddy has nic-named it "the wanderer"
While driving the truck just moves side to side and im always having to wiggle the wheel to get it stay moving straight.
What should i replace first?

(oh, im running 35X16 tires on a 15" wheel and the truck has a 6" lift and 3" body lift)
Number Two.
Im not sure what gears i have on her now but i can barely get up to 55-60. I would like something more for daily cruzing.
Should i go with 3:73 or 4:56 or something else? I want something that will allow me to drive the truck and keep up with traffic. The only offloading i do is at the beach and very mild trails and power line roads no hard core mudding.
Thanks guys!
