Going with Erick is a very good decision. that said, I did the cradle bushing swap using the method one of the posters asked about. I used my Sawz-All and a butane torch to burn and cut the races out. IT worked very well for me. To respond to the question of what are the the effects of having Poly bushings. My car handles drastically better, there is a little more feed back in the rear. It feel more like a solid axles. Wheel hop is dramatically decreased. I think I'll permanently eliminate wheel hop, once I upgrade my trailing arm, to one of the options out there. I also upgraded my diff bushing to one of the solid units that HHP sells. Lastly there is a little feed back in terms of noise when going over rough roads. The cradle doesn't give like when the stock bushings were in so you hear vibration sounds. It's barely noticable, unless you don't have the radio on.