Thinking about a bike with 7401 7 speed dura ace and uniglide 7 speed cassette.

Is this only compatible with 7 speed uniglide or is the spacing on, say, a new sunrace 7 speed freewheel ok?

Can the 7401 rd be used with indexed 8, 9 or 10 speed dura ace dt shifters with associated hyperglide cassette?