Why not?

A 3126 is a pretty common engine.  Shouldn't be very difficult to find lots of people who are capable of working on it.  Especially the heavy mechanical part....setting the overhead up when it's finished might require someone a little more specialized but that's only a small portion of the job. 

Keep in mind you're dealing with a parent bore engine here.  Things can get beyond economic repair pretty quickly when you start having parts floating around in the cylinders unattached.