Slap the V/C back on drive the wheels off of it till it blows, then you'll know for sure what the the problem was, otherwise tear the thing down and do an inspection.
It's obvious it's an internal issue.
Those engines are notorious for having lots of lifter issues, piston slap and piston pin problems anyway, your beating a dead horse get busy fixing it or buy a rebuilt unit and be done with it.
JMO>Cp