See the link in my signature, there's lots of info there. I don't think you'll find a suitable V6 diesel, but there are a few different I4 diesels that could be made to work... the 1KZ-TE and 2L-TE toyota diesels are probably easiest to fit, relatively speaking.


'87 Xtra Cab, 4wd, 22r, 5spd
'92 Xtra Cab, 4wd, 2L-TE diesel swap, 5spd
http://toyotadiesel.com/forums/showthread.php?t=2502