I believe you need th 613-16 retainers as our valves dont need lash caps. I could be wrong but then again i havent needed anything like for my cam swap. As far as shims, you might not need any. The best real way to find out, is to call LPE and see what they recommend the install height is for those springs. Then buy yourself a valve spring height micrometer and measure them. That way you make sure everything is set up correctly.
*EDIT* Please make sure to post a sound clip or video of that cam as there is not one anywhere on the net. I searched high and low a few years ago because i bought that cam for my old third gen and i still want to know how it sounds.