I'll just toss in my
here. Don't re use the head that had the melted piston. The aluminum that melted and coated the cylinder head face is inside the exhaust port on the head and all over the valve seat and valve.
The reason the two push rods were bent is because the material that left the piston stuck to the valves, seats, head surface and didn't allow the valves to close. When the piston comes to TDC, the valves need to be closed, there is no room in the cylinder to have the head of the valve protrude below the head casting. Nothing is wrong with the timing. This also puts stress on the rod in a bad way, it should be replaced too.
Take a look at the crowns of all the other pistons. If there are any marks on them from something being in the cylinder, you have lots more work ahead of you. If there has been debris from the melted piston into the other cylinders, you'll need to replace the intake manifold. The reason for this is that the intake is a water jacketed type of manifold, there are little castings inside it that secure the two parts of the manifold together. If a piece of that melted piston is stuck inside the manifold in a coating of oil or wedged in one of the little nooks or crannies, it WILL dislodge after you put the engine back in service and you'll be doing the same repair again, or worse.
You'll also need to put another turbo and exhaust manifold on it. All that melted metal has coated the manifold, turbine housing and the chunks from the piston have ruined the turbine wheel. if the engine is put back into service with the failed turbo, worst case here, the engine will fail catastrophicaly. Keep in mind, the turbo spins around 60k RPM, maybe a bit more or less. The turbine wheel already has damage to it. The damage will continue to get worse by removing more blades from the wheel. This makes the shaft/wheel imbalanced, it starts to "wobble" if you will, You are just putting it around at a low RPM, say 1500 RPM, that turbo is still going real fast. The shaft finally breaks, it sends pressurized oil out the back AND into the intake. The engine now has an uncontrolled fuel source. It will run as fast as it wants to for as long as it has the fuel source, usually around 4-5 mins, seen it happen multiple times, I do this for a living.
Don't mean to pee on your parade, doing a 1 or 2 hole repair is fine and a normal procedure, but you have a bad failure. Minimum you will need to do is have the heads sent out and disassembled to check them out, but that is more $. I don't know where Grand Island is, Your best bet is to find another running engine at least for parts, but if it were me, i'd swing the engine or go through it completely, there is too much debris throuought the engine to just fix as failed.
At a minimun, the parts you'll be needing are as follows;
2 cylinder kits, 1 rod, 2 push rods, 1 head, turbo, exh. manifold, 1 injector, intake manifold, upper gasket kit, plus the oil and filters and coolant.
I don't mean to come off sounding like a prick, but IMHO, you'll spend your hard earned cash on the fix, and it will happen again a day or two after you make it run from this failure.
Will