FWIW, the Vega bellhousing is different than the Nova bellhousing, which is an animal all to itself.
There is a 6 cyl (small hole) and a v-8 (large hole) bellhousing made for Nova's that has the clutch arm at 7 o'clock.
I'd bet that something was modified at the pedal end of the works for the cable attachment, also.
Hope that helps.
Jeff