Ok, I have a brand new LQ4 sitting on the stand waiting to go into the truck in my sig, eventually. I bought a GT2-3 cam to compliment the Radix (maybe even an MP122HH!). I am thinking about using the Crane 1.7 "Quick-lift" rockers, as I have the same thing, but in 1.8 on my 5.3, and they work great for my current combination. I haven't heard of anyone using this combo (LQ4; GT2-3; Crane 1.7 "Quick-lift" rockers) yet. Is there anyone ysing this combo, or have any ideas?

 

I would use the Crane rockers with that cam. If anything, they will make the lobes "look" more aggressive at the valve. If you don't already have dual springs, I would reccomend them.