Stoffregen Motorsports
Explorer
There is a thread for these trucks that may be interesting for you to look at. Check out post #112 on page 12 for a before and after shot of an OME lifted truck. OME may be closer to 3". Don't know what the tire size is, but it may be bigger than 31". Consider that with the lift you may need extended brake lines, and the steering geometry is changed. http://www.expeditionportal.com/for...-First-Gen-Pickup-Hilux-(79-83)-Thread/page12
You can clearly see the long shackles he used on that truck. If you used stock shackles front and rear, it would bring it down just about an inch.
I used a custom high steer setup on the '87 I'm building and it barely fits. What I mean is, any lower and I would not think it was a good idea. But to be able to use a high steer you will also need to convert to an IFS steering box too.
Extended brake lines are not a bad idea.
Cost for this lift:
Springs and bushings- $400 for all four
IFS Box - $300 rebuilt or $75 used
IFS Box Mount Kit - $75
High Steer - $300
Brake Lines - $75
Shocks - about $75 to $100 each
Probably want to rebuild (or reseal) the knuckles and repack the wheel bearings too for an additional $150.
You can probably delete the IFS box and high steer, but you will need to get the lifted J-Arm for the driver's side knuckle and I don't know if those are even available anymore. I have a used on if anyone wants it.