Actually the last year for the solid axle was 1985 for 4x4 Toyota vehicles. The 1986 model year saw the intro of IFS to "comfort" the consumers butt and allow for a better ride and handling. Though the few of us who use our trucks for serious wheeling, the IFS doesn't provide the strength nor the flexibility a solid axle provides. You can convert a IFS truck/4Runner to solid axle, the cost is around $4000 and this includes the bone yard axle. The work is extensive and really does pay for itself.
LUV24BY
LUV24BY