Max lift/stock slugs
Been thinking about this as well in choosing a cam for my 5.9 build.
I know aftermarket pistons that come up to deck height have valve reliefs. The stock pistons are down .050 and have no reliefs.
I'm planning to do the clay test with one of my new IMM heads using the stock cam. I think I will also map the valve lift with a degree wheel, with checker springs in one of stock old heads to get an idea of how duration changes will come into play before ordering a cam.