Im going with the GM 847 234/242 .575/.595 112 and what spring should i use?

Options:

Springs-:
-K motion- KMO K-800
-CC 987-16
-CC 893-16

I don't know which is dual spring max lift or will they fit without machining.

Retainers:
-CC730-16

Keepers:
-CC611-16

Someone mentioned spring seats. But i do not know what that is, but the part # is CC4784-16

Can you help me understand better! Make sure i get the best set for my set up.

Atljar: I know you have helped but are the springs the best option? Also did you have to use spring seats. tracey is telling me that i need them.

Here is what i was told to get

Valve Springs K-Motion K-800
Retainers-Titanium Comp Cams 730-16
Keepers Comp Cams 611-16
Spring Seats Comp Cams 4784-16
Valve Seals GM ?

 

This cam Lift is .539/.558 w/1.5 RRs, .575/.595 w/ 1.6 RRs

Per the Crane spec card it calls for Crane Springs # 99846 but Crane recommended to me the Crane 99893 Spring kit PN# 10308-1 which has a 130lb seat pressure and .710 max lift because I was going to 1.6 or 1.7 RRs.