I put in all poly bushings and likem. I don't have squeaks or rattles after almost a year so I say go for em. Did notice a little difference in ride(very little) its more sports car than it was but thats what I was going for. Feels more solid now. 
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New daily driver 96 Chevy K3500 crew cab dually 53,000 miles 350 Vortec 4L80
Nice ride 67 Chevy C-10 LWB Built 350 TH-400
Wifes ride and family rig:
2001 Furd Expedition 5.4 Liter 
Kickin back in Rolla,Mo. USA
"Do the thing you fear most and the death of fear is certain" Mark Twain
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