Thank you for the replies,
Yellow rose, I have read the articles you linked part of the reason my head is swimming. I have a adjustable push rod for checking the proper push rod length, as I understand it push rod length is critical since the stock rockers are non adjustable.
I will be using RHS LAX heads as soon as I can source the correct head bolt as it seems the correct ones are neither LA or Magnum style.
Where I am foggy is the correct step by step procedure for setting the valve train up with the proper lifter preload and ensuring the correct geometry throughout the rocker arm travel.
My cam is mild .477/.480 from my research the stock rocker system is more than capable in this lift range as long as push rod length is correct.
I do tend to overthink things, I am pretty handy with a wrench, however with a new system that I am not familiar with I like to have a tech manual of experienced oversight so those rookie "well now you know" moments are avoided.
The SBM is too pricey to learn from my mistakes and prefer to do things right so you only have to do them once.