The v brakes will mount the same as cantis on the frame/ forks - the problem is the levers pull different amounts of cable, so you wouldn't have much luck...
Back in the day you could get a device called a travel adjuster that adapted the canti lever brake pull to v, and I believe also used on road levers (sti) to allow them to work on v's (cantis can be used with sti levers as-is)
Personally I have never mix-and-match them nor used the converters.