Generation IV Internal Engine - Need some info on how to do about preloading lifters

Here is a list of the parts that im running

Forged 347 LS1 block
ARP Head and Main studs
Stock 317 heads
Stock GM MLS head gasket
Scorpion 1.8 Roller rockers
Comp 7.4 pushrods
Comp 212/218 .558/.563 115LSA
Comp 875-16 "R" lifters
60 lb injectors
Mp t70 @10lbs

Now, I'm aware that the ''R'' lifters from comp require 0 to 1/8 pre-load but how do i go about that when using non adjustable roller rockers? And will i have an issue when using my stock length pushrods? Any input would be real helphull.

Thanks,
Mike

preload is determined by pushrod length.

Determine correct pushrod length and then add the desired lifter preload to the pushrod length.

For example:

Determined correct pushrod length - 7.400"
Desired preload - 1/8 turn = .010" for a 1.7 ratio rocker using 1.25 thread pitch

Final pushrod length - 7.400 + .010 = 7.410"