Upgrading Cam and valve train

[Lookin4the1]

I've come into a bit of good luck (maybe?) with my wiring setup and ecu. I have neither. I'm buying a psi harness(brand new) and a ecu for my lq4 with 4l80e that has already been wiped. The only issue is it was tuned for a certain cam. Luck would have it, the guy im buying it from has the cam as well. (The previous owner went in a different direction after 1000 miles.

now to my question. When I purchase this bundle deal. What else am I getting into? Here are my thoughts:

The cam: TSP 233/239-112

springs: pac 1219

retainers: PAC Racing 300 Series Valve Spring Retainers PAC-R310-16

I'm new to this so I'm not sure what retainers to get.

push rods: completely lost.

in conclusion: please help. I'd like to end up with a little better performance than stock. what better time then with the front end off and half the accessories and intake already off anyway?