ls6 intake and ls6 valley pan questions

[my kids toy]

I have a lm7 engine and I am swapping the truck intake to the ls6 car intake, I am replacing all the brackets on the front and I have a complete intake and I am doing a stand alone harness so the rails/injectors I have figured out.

The questions I have is
Should I use the ls6 valley cover or stick with the stock valley cover ?

seeing I need to get a harness should I use the tbc or get a tbw ?

With the LS6 intake do I have to block any holes off or change any ?

sorry for the questions, I have been doing a lot of research but every little tid bit I get is from different posts and a lot of things I am not doing and most of it just confuses me.

Do I also need this ?