Would I do it again...
All day long. Keep in mind that most of the work was done by the folks at Ironpig. They were contracted to do the majority of the work, with the help of a big checkbook.
I can't tell you how amazing the thing is! When you listen to it run you want to give it a hug. It sounds incredible and only gets better when the super charger screams. The fact that all of the drivetrain is Toyota is as cool as it gets. I have a TPI'd 350 in one of my 40's and it is great for what it is. It has more power then I might ever need but it is just a Chevy motor. Everyone has one these days and it is nothing new anymore. I have a bone stock set up on another that is great but a slow fat pig.
If you have the ability to source, install, and wire this type of set up, I would go for it all day long. If it is something you will have to pay to get all done, you might want to think twice about it.
The 55 is real close to getting out on the trail now. Gumby is going to give the lockers a once over and I have some suspension stops to finalize. Otherwise it should be ready to "break" in.
I have seen far too many cruisers in my life due to my obsession and would have to say that this set up is one of the coolest things to do. Crate motors are simple, clean, and much more cost effective. But Toyota parts in a 71 fj55, or any other old school cruiser, is the way to go.
That's just my opinion.