If you've got sliders installed, you can use those. I know the welded versions hold quite well and I've jacked my 01' up from the welded version I got from Richard Stubbs. Since I have rounded tubing sliders, I was able to pick up a slider adapter from a guy on Pirate4x4 that was making them before he quit doing it. It's nothing more than a piece of square tubing with a 1/2 round-tube welded onto it that bolts up to the hi-lift directly. For round-tubing, it works very well. If you don't have sliders, I've seen some strap attachments that lift from the wheel directly, but I don't get warm fuzzies from that one. I know they make an ARB bumper attachment that the hi-lift can mate to.
Here's a link for a regular bumper attachment...
http://www.4by4connection.com/bl250.html
This is the strap version that attaches to the wheel...
http://www.4by4connection.com/hiliftliftmate.html
This is the ARB adapter...
http://www.4by4connection.com/arbhiljacad.html
I did find this site that's making slider adapters that look pretty similar to mine...
1979-1995 4Runner/PickUp Sliders