PoloGreen 3.4

So im pretty much gettin a new set up for my 88gt. The car right now is completly stock, so I think I want to go with some chrome cobra r's, and some eibach sportline springs. My question is that I was told I would need to get new shocks and struts. Do I need to get new shocks and struts? Also if anyone could tell me where to get some eibach springs for cheap that would be great. Thanks!