How hard is it and how much to change out rear freeze plugs??

What else besides the freeze plugs do u think It could be? All the fluid was coming down the back of the block. And when I put a gallon and a half in the reservoir to get home 3/4 of a mile, it was all gone in that distance and still running down the back of the block and out of starter.

How about the heater hose in the back of the intake? Look around!

There is no fluid anywhere on the bell housing but I will check again when I get home from work. Thank you!!! I just got home from work and starting digging around and you were right. The heater line on the back of the manifold sheared off the clamps and broke the insert into the manifold. Easy fix I can do it in the yard. Thank you so much for your input. Saved me big bucks. I got this shit man. Thanks again