alternate solution
Does this dish have four tubular LNB support arms (probably with a slight bend in 'em near the dish face)?
If so, it's prime feed.
Or is this an offset dish?
As I recall, that one has three tubular supports holding the LNB.
I've seen both.
I recommend an AJAK 180 motor, or maybe a Birdview if ya find one with a damaged dish.
(yes, a few years ago, we ran across just that very thing!)
Either motor should have no trouble swinging a molded 6' dish from horizon to horizon.
Both motors are for prime feed dishes, but...
We've got members who've put offset dishes on both, so that's not a problem.