I would venture a guess that victory are ground as they were second in the line-up but I don't know. Chorus were ground and they are essentially the same hub (well actually the same hub but came with slightly different skewers)...

You say your C-record hub has 8 speed shimano? I don't think shimano ever made an 8 speed freewheel so are you sure? Is it a freewheel or freehub? If it is a freewheel you should simple swap (or saw) the axle and respace/redish and put a 6 speed freewheel on.