I'm in the process of a full re-do on my van (E 350 w/ Fiberine Bubble top).
I have decided that the the best way to make a garage under the bed that can house two mountain bikes on occasion when I'm on long trips and don't want to leave $12k of bikes sitting on a rack in urban setting is to make it so the bed in the van can go up and down.
I've looked at the HappiJac ( https://happijac.com/bed-lifts.html
) and it will really be a PITA to make work in van that doesn't have straight walls that taper to the top like a E-360 w/ hi-top since it has the cross and side posts for the chain and drive drive shaft... not to mention it is a pretty pricey bit of kit that looks to be pretty damn heavy and probably a better solution for a Ford Transit or Sprinter with more straight vertical walls (or an RV / trailer like it was originally designed for).
After quite a bit of searching on the internet and seeing what some folks have done, it seems linear actuators are the way to go with some sort of a track setup on the four corners of the bed for guides/stability.
Has anyone here done this? I would love to hear comments on how you built it!
My goal is to have the bed lift to a fully extended height of 40" off the floor of the van, and then when not using the area under the bed for bike storage, I could lower the bed down 18" to get more head room while in bed.