Wow. I've been endlessly inspired buy your truck. I have a 1991 Pajero that needs some suspension work. Bought a set of procomp 9000 to get me by for now and I'm hoping to have the 33 in tires on soon. You had mentioned putting heavy weight springs in the back. Because of the speed at which I browsed this forum, I think I missed some facts. First you mentioned you were going with OME rear coils but then later I saw something about ordering springs from trdparts4u or some thing like that. Were they infact the OME coils that you used to replace the factory springs or a Trd equivalent.
Howdy. Glad to know my rig has been inspirational...
I did indeed buy Old Man Emu (OME) heavy springs. I bought them from a great company who deals with a variety of overlanding parts (ARB products among others). That company is TRDparts4u, give Jacque (aka Coonass on ExPo) a call and he can hook you up with anything ARB supplies. They get frequent shipments so get your order in before the the ship leaves.
I will update my first post with details.