I'm not sure there are many build threads for FJ55s detailing engine swaps of the "old" V8 variety.
If you look at my build thread(linked in my signature), I detail a 6.0L Vortec swap. Details will be similar for your V8 swap... but there are differences such as the motor mounts and engine height.
Worth noting is the FJ55 engine bay is a bit shorter than an FJ40(if you are familiar with those). As such, you really have to be on top of the vertical placement of the engine.
Easiest way to get specific info is just to ask.
