While I appreciate the gesture, unfortunately, that won't work very well.... You see, even a simple artillery piece (which have the fewest needed animations for any unit due to the fact that they only bombard) still requires at least 5 separate animations: Default, Fortify, Run, Attack A, and Death (if it gets captured by a faction that can't build it and/or disbanded)...
Each of these animations (if you want your unit looking at least halfways decent) must face 8 different directions, and about the LEAST amount of frames you can get away with for an animation is about 10 frames per direction, which amounts to 80 frames * 5 animations or 400 frames that need to be rendered and converted into Civ III compatible FLC files.
In addition, you need a large pedia icon, a small pedia icon and a Units_32.pcx icon (for when you pick the unit from the build list in the city screen or for seeing what's inside a loaded transport ship).
...and that is the BARE minimum... Most creators also include a Fidget animation and a Victory animation to spice things up a bit.
While I could POTENTIALLY build the model for the Mobile Type 8 in Bryce, it would take a lot of time and effort, which I really don't have at the moment, what with school, work and helping my mom out because she's going through some heavy-duty chemo right now and is rather strictly limited to what she can do around the house.
...Besides, I've got other priority issues even when I do have the time, the first of which is finally getting around to FINISHING THE DADGUM CHOCOBO LINE.... That, IMO takes priority over all other unit-related items for this mod....