The new heads have much longer heli-coils in the heads than the early version of the heads. You did not say what cam and spring pressures are going to be used?
I used the Angelcci Aluminum Max Wedge rocker stands. This was because I broke the center stand on the early set of heads. I did not know they upgraded the heli-coils in the newer heads, so when I got those new castings, we cut the stands off and installed the max wedge style stands.
The process was to remove the original heli-coils and mill off the rocker stands, then we installed 3/4" long stainless steel Time-Sert thread inserts. Figured the height the rocker shaft should be for good geometry, and milled the rocker stands to get that rocker shaft height.
Used ARP studs to hold the rocker shaft stands to the heads.
https://angeluccimfg.com/products/mopar-max-wedge-rocker-standsI think T&D now has paired shaft rocker arms kits that might be a stronger/stiffer setup if your going to run really high spring pressures. I'm only running 0.726" lift and around #700 open spring pressure, PAC-1326 valve springs.
