No you cannot fit a shimano cassette as they use a different number of splines .
Your freehub is much earlier than the OPs with the ratchet pawls in that location (like the 571/2 hubs) so you cannot use a shimano made body either .
If you want indexed shimano 8 speed (4.8 mm spaced) you would simply be able to use the shimano spacers to get down from Campagnolos (5.0 mm) spacing
If you want more speeds you "may" be able to use the shimano loose spacers (from about 3 cassettes as many are pinned onto spiders) and find another campagnolo cog assuming the steel cogs are the same width.
Your freehub is much earlier than the OPs with the ratchet pawls in that location (like the 571/2 hubs) so you cannot use a shimano made body either .
If you want indexed shimano 8 speed (4.8 mm spaced) you would simply be able to use the shimano spacers to get down from Campagnolos (5.0 mm) spacing
If you want more speeds you "may" be able to use the shimano loose spacers (from about 3 cassettes as many are pinned onto spiders) and find another campagnolo cog assuming the steel cogs are the same width.
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