I've installed nothing but Poly/delrin/nylon bushing in my toys/DD or customer's vehicles for the last 3+ decades, and learned the hard way to avoid squeaks, don't tighten components until at ride height, use the mfg recommended lubrication, never use petroleum based lubricant during install or usage, follow the mfg's recommendations if your not sure of install procedure...
Mike
And will add I buy the lube in small tubs and use it liberally. Once everything is done, go back and clean up any residual lube. The stuff is nasty as it sticks to anything it touches.
Brake clean, carb clean or acetone works well but be careful on painted areas especially with the last 2
