Here's a front 4.56 ready to ship (found on car-part.com)
Plug-n-play with your front end (manual hubs) <img src="/forums/images/graemlins/kewl.gif" alt="" />
Quote
1993
Carrier
Toyota Truck 4.56 B0416 $40 Pickup City, Inc. USA-WV(White-Hall) E-mail 1-888-733-2540


And for the rear (4.56)

Quote
1991
Carrier
Toyota 4Runner Axl, 4X4, 6 Cyl, w/o ABS; 4.56 ratio--B A E071 $150 All Foreign Auto Parts, Inc. USA-TX(San-Antonio) Request_Quote 1-800-833-4941/1-210-623-5000 Request_Insurance_Quote


No break-in required. Just run-em (as ZUK told me when I did the same thing to my 4Runner)

85 4Runner - With NEW Marlin 4.7 Gears!! It's a whole new beast!