First post over here at Expo and couldn't pick a better time to join. I've also got a built '92 (admittedly bought it lifted with ARB lockers, ARB bull and some other work already done) and loved reading your thread. The time and dedication invested to get you where you are today with your FJ is inspiring - WELL DONE!
If you're 'Summit Cruisers Jr.' then your dad must be Steve? I'm over at Mud (same avatar there - tlin) and he's chimed in on a few occasions with some sage idle-related advice - great guy.
Concerning the 4.88's, it's something I've been toying with in my head as well since freeway jaunts are a bit underwhelming with the 3FE (I can cruise at 70mph but passing power isn't exactly something I'd say is in my arsenal). Knowing what you know and having already gone with these gears, are you after any other performance mods?
Last, just a reminder but wider tires will continue to scavenge performance (higher rolling resistance) so some of those benefits you gained with the 4.88's will be lost if you do elect to keep going bigger/wider with the tires - something to ponder. Great pick with the steelies, I'd go that route as well if I was after wheels.
Great stuff here, LOVE YOUR RIDE!
--todd