Hi Chester
Most indexes are just that - an index. Some give whether the parties are widowed, and the parish of residence, but that's about all.
As you seem to know where and when they were married it's a case of checking with the parish register to get the extra details. But pre 1837 you don't usually get fathers's names - just the names of the two witnesses, plus the parish of residence at the time of the marriage, which is not necessarily the same thing as place of birth.
Check the Cambs FHS website at
http://www.cfhs.org.uk/Search.htmlto see if they appear on the Baptism Index. Have you found them in 1851 which should give their place of birth?
Regards
David