FWIW: I have used Indy heads when the customer specifically asks for them - otherwise I use Stage-V. But I have noticed that sometimes the Indy Hemi chambers are fine (meaning I didn't need a special piston) and other times I have seen them tight in one axis or another. For a street Hemi either would have worked, but as you start pushing the CR the dome fit becomes critical. Since then I always use clay to not only check for P-to-V, but I also put some clay around the outside so I can check for the "Squench". Once I found that the dome shape was okay, but the bore spacing was wrong which showed up with the clay check.

One rule that I think everybody will agree - NEVER use any parts out of the box regardless of the vendor! Have a good builder check and remachine as required.