2003 Ford Taurus blown head gasket

If teh engine got hot enough to siexe, there is likely damage to the crankshaft bearings and/or pistons. It may be rebuildable, but not economical to do so.

Once overheated to that extent, modern aluminum engines tend to warp. This creates untold problems later on, even after a repair.

The most economical solution would be to find a good used engine in a salvage yard.