Rear Coil Springs, Knowing when Bad??

[aboyer]

I have a 68 C-10 and have just replaced the body bushings and shocks all around. Earlier this year I weight in the back of my truck to handle better in the snow. Now that the weather is better, I have removed the weight, and I am getting a ton of wheel hop.

I am trying to improve the driveability of the truck, but I am wondering if the springs might be shot?? The rear end seems very light and not handles well over bumps at higher speeds 40-60mph.

Does anyone have any suggestions? How do you know when the springs need to be replaced?

Thanks in advanced.

Adam