torsion bar and ps box upgrade

you talking about poly bushings for the springs?

http://www.summitracing.com/parts/rat-324k/overview/year/1975/make/plymouth/model/duster

does this look right? i cat find any information about bearing sizes. only thing it says is that its for a 29 spline pinion. i know my axels are 27 spline, but i dont know about pinion.