@Headhunter38 please keep us updated with what you find, good or bad! I've been struggling to plan out a front end rebuild and feel like there must be some other 4runner or truck suspension parts that would fit here that would make future maintenance and mods/lifts easier.
My preliminary measurements lead me to believe that it is possible. The CAs are nearly the same size the only issue is finding the right placement of it and the mounting holes for the 4runner arms. The vans bolts are vertical and theres only two of them,, 4runners mount horizontalaly and there's three of them. I'm not sure but I think the 4runner ca mounting part can be rotated 90 degrees and then just new holes drill into the vans frame. The attached pictures shpw what I'm talking about. I plan to take a more detailed look at it when I get to doing the front end bearings and brakes. I also believe that it's possible to swap the lower control arms, cv axles, hubs, steering knuckles and brakes to the 4runners. That would make it a lot easier getting replacement and upgrade parts. Of course going that far will require a lot more time and fabricobbling. I will definitely update on here if and when I can get to this.