I don't know if it would fit on a 3rd gen 4Runner, but AFAIK it would bolt onto a 2nd gen. Couldn't say for sure if the rear valance would have to be trimmed, but on a pickup you have to cut notches to clear the mounting brackets.
'91 Pickup - Imelda
'08 Tacoma TRD - Donna
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29
"Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty. Nobody is able to achieve this completely, but the striving for such achievement is in itself a part of the liberation and a foundation for inner security. " --Albert Einstein