Welcome to the group and congrats on getting a great looking van.
Porta Patti - we have the Thetford Curve. It works great.
Penthouse bed - there are all sorts of ways to make one. The simplest is a sheet of 3/4" plywood with a couple of inches of foam on top. Many are suspended from the roof when not in use.
Leveling blocks - we have a set made by Camco but hardly ever use them. Have also used homemade wood ramps and tree stumps.
Awning - lots of options here. Use a tarp that attaches to the van on one side, others have Fiama awnings that are permanently attached.
Read detailed trip reports, see photos and videos on my travel blog, luinil.com.
Current van: 2002 Ford E350 extended body camper with Colorado Camper Van pop top and Agile Offroad 4WD conversion.