I've installed several Dakota three position safetys on VZ-24 actions.....and always in conjunction with a Timney trigger. Yes, there have been some difficulties but I have always got them to work and quite nicely.

I've had Jim Kobe install a Wisner two position safety and it too works quite well.....but the two position safety does not allow me to open the action while the rifle is still on safety. This is the only reason to make the converson IMO.....a two position safety can be had from Brownells for a whole lot less than any of the M-70 type safetys.