front bushings.....

[staggerd86c-10]

i have a question, im planning on finally fixing the front suspension on my truck but i dont know where to start. to do a total rebuild will set me back like 500 bucks that the economy is not helping me attain. my truck drives nice and straight but there is a small bit of play in the steering wheel and when you hit the brakes it wants to go to either side. i know it needs an alignment but what else can cause the truck to throw itself to one side when you hit the brakes, and its not only one way it can go left or right as soon as you hit the brakes.