I have a Gozzard tub that I bought back in '03 for my '82 FJ40, and I have been gradually working on it ever since. Life interfered with rebuild plans...
The Gozzard is a nice product, but be aware it takes a whole bunch of work to make it work. Body mounts are non-existent and must be fabbed. No firewall cutouts or holes. No holes for anything. Almost everything must be measured and located off old tub, or by trial and error fitting. There are some pre-drilled stainless steel plates for installing a few items, but even those can present a challenge. I about went nuts getting the door hinges installed. I still have my original tub sitting outside the garage so I can reference off of it, or cut parts off that are needed (like the blower motor "cone").
I have a '78 that needs a new body, and I'm looking at HFS or Aqualu for that one, since I just don't want to spend the time to figure out ways around every little hurdle that the Gozzard throws up. I'll likely finish the '78 before the '82.... I'm not going for any sort of "restoration"; I just want a 40 to drive.