Well, I do have a non-stock cam, but I have no idea what it is. The previous owner just told me that the engine was rebuilt by a shop 30k ago and he didn't know specific details of the rebuild. At this point, if I make sure to listen closely to the engine when driving, and if I check everything in a couple of weeks to make sure there is no rapid wear taking place, is that about all I can do (other than buying a new cam for which I do know the specs)?

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