Poly bushings install on rear leaf springs

Hi,

Is it correct that you have to remove outer metal sleeves when installing energy suspentsion poly busings on Ply Valiant rear leaf springs.

Is there outer metal sleeve used only in the main eye (if this is the right term for the front bushing hole) or is there one in the rear eye/hole also ?

Part I'm using is: http://www.summitracing.com/int/parts/ens-5-2106r/overview/make/plymouth/model/valiant

Thank you

Chris