Getting new tires..
 

okay so right now i have 3/32 tread all the way around .. yeah i know.. but anyways i planned on getting new tires on my next paycheck, about 300 for all 4 (goodyear wranglers)... thing is my truck starts shaking sometimes around 70+ and i think its because of the tires are so wore out.. but will my truck ride any better once i get new tires put on it? all ive ever had on it was used tires so i wouldnt know.

It could. You need em anyway, give it a shot. Worst case is you fixed the tire issue and you still gotta fix the shake, best case is you fix both in one!

New tires will make a vehicle ride and drive totally different. Just make sure your alignment is good so you dont wear the new tires funny

you may have just thrown a weight of the rim and need a rebalance.
i would not go with the Goodyear Wrangler Radials. i put 4 new ones on and 2 years later they where cracked to hell.
i can tell your from Canada because 70+ is probably KM's. make sure your front wheel bearings are good and tourqed properly.
if you have a 4x4 check the front axle boots for a leak through the boot.