Not 100 percent sure. But I've checked out the manifolds and they seem fine. It seems to be towards the rear, maybe a flange back there somewhere. I'm having an o2 sensor replaced this week and I'll have them take a look.
I'm selling my wife's landcruiser. It has been a midwest vehicle it's whole life. Undercarriage is decent on rust. Some rust on rear quarter panel.
I'm located just north of Peoria, IL. I'm gonna snap a bunch of more pictures tomorrow AM and I'll get them up here. Thanks in advance. Feel free...