Raised Port Head Question

Hi all. Quick question on raised port heads. I got a heck of a deal on a set of the SM victor copies, but this is my first time running raised port heads. I know I need the offset rockers, and will need longer push rods. Question is on the valley pan… looks like I’ll need the AR Engineering or Edelbrock 7799 trays. Can these be installed/removed with the heads on? Not a lot of info on their website.

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