Salbando,
You've got a major problem. The C-54 and C-118 are two completely different
aircraft. They do bear some resemblence but the C-118 is a much larger aircraft
with differently shaped verticle stab/rudder, horiz stab/elevator, different wings,
engine nacelles, props, landing gear, wheels/tires, and etc.
I don't know of any C-54 kits myself but, if any are out there the folks on this forum
will know about it. Hang in there...An SC-54 is a very worthwhile project.
Ray