So my first thought is, why not take the rear inlet out before installing anything? Seems like a lot of hardware was dangling around and probably made the install a bit more tedious. And I didn't watch it all the way through but, the waterpump and coolant tstat didn't get replaced? Not a huge deal if its been replaced already, but chances are it has some miles. Also taking a mallet to those fittings probably just increases the chance you'll damage them or the block IMO. They should press in by hand IIRC.
Also, screw the freeze plugs...Did not like that idea. I cut and welded an old oil line.