I am planning on putting a lq4 into my 2007 sierra classic. Are the 6.0 TB and intake different as far as TB size and intake flow than my Z code 5.3L or are they the same. I just dont want to bottleneck in my new engine if I need to hunt down 6.0 stuff so be it. Lq4 bottom end 243 heads and a comp cam spring pushrods etc

 

It's all the same size stuff from 4.8 through 6.0...just re-use what's already on your truck and you'll be good to go (depending on how big a cam you go with and how much the heads flow).