Loose
 

I have a 1994 with stock suspinsion. When I turn the wheel the back over the car wants to overreact. It feels like the whole car wants to spin. Like the rear is sliding. Also feels like the body wants to flip off the wheels. When I am messing around and act like I am heating my tires The back goes everywhere even if I barely do it. What is the best way to fix this. I am about to put 17x9 wheels on as soon as I find tires. Will this help? Thanks in advanced.

Low tire pressure?

are the quads still on the rearend if so id look into upper and lower control arms