'95 3.0L, managed to run it dry with a leaking oil filter.  *Berate here*  Got the rig towed home.  The engine still turns over but there is a horrible rattling in the upper part of the engine and it has lost power.  My question is:  Will this require a full engine replacement ($6000 at dealer) or can a rebuilt head do the job?  Are these engines (main bearings) prone to total failure when running dry?  I just want the straight story so I know were I stand when talking to a mechanic.

Thanks,

Al