What does it weigh?
You might be better off with something like a STAB HH-120...
...or see if any of Sadoun's new motors might be suitable.
edit: nope, doesn't look like they're rated for it.
The Motek H-180 could probably be adapted, but then you'd need a Vbox, too.
That Stab 120 is looking better all the time.
One thing I am sure about: That 4' dish will do wonders for your C-band!