Generation IV Internal Engine - LG G6X3 in an LS2

Anyone here have any experience putting this cam in an LS2? I’m running stock heads, lifters, rockers and gaskets. I used Lunati dual springs and Comp 7.400 pushrods. With the rockers torqued to 22 ft lbs all of my intake rockers are loose. There’s probably .005 of slop between them.

Anyone? Why would I need a longer pushrod if all I did was swap the cam and springs? I called LG and they claim the G6 does not have a smaller base circle than my stock cam. WTF?