Valve springs...

I have the CCA-CL20-222-3 camp, grind number CRS XE262H-10

and its telling me to get the CCA-901-16 springs.
http://store.summitracing.com/partdetail.asp?part=CCA-CL20-222-3&autoview=sku

question is, The guy befor me put the edelbrock performer stuff in, cam, springs, intake, and carb.

Do i have to purchase new retainers/ valve locks/ and shims if i go with the comp cams springs or can i re-use what i have????
thanks