Scrounger;
Please don't be offended but I can't tell if this is a quiz or a joke.
If you have ,in hand, a M92 Rossi ,you should see better than I, that the holes don't appear to match up.
Furthermore the second picture gives no indication that there is slope in the contact surface of the base which will be necessary unless you have a separate block for the dovetail to elevate the base on the front end. which you'd need for a round bbl. I've never been fortunate enough to have an Octagonal bbl to consider. That should simplify things. Is that your bbl?
Jumping back and forth between receiver mounted scopes and scout scopes can make for confusion in the discussions.
Are you trying to decide between a scout vs, receiver mounted scope?
Pepe Ray