Lovely blog-post! It's sweet when an old childhooddream now can become reality!
I thought of sharing this website with you: http://www.bobscardmodels.net76.net/page2.htm
On it, there are several paper-model-plans and not only one, but two C-119's.
I thought you might be interested in using one of those for your build (or get some inspiration).
I used the plan from this sit for building a Grumman Albatross (http://www.rcgroups.com/forums/showthread.php?t=1491835
), it uses an AR6400 with two UM Cub J-3 motor/gear./prop. and doesn't lack power, so I'm convinced that an AR6400T with the mosquito's power-unit will deliver plenty of power.
Happy landings :-)