If all you have is trans mods you listed I doubt you'll have it functioning for long. The LS4 cars eat transmissions like candy and I don't see anything beyond parts that come on the LS4 tranny in that list. Remember this is at 300hp and 323tq.

You can easily push past that with a turbo setup. Instead of a L67 you may consider an L32 as well, IIRC you will be starting with stronger internals.

Good luck!