Is it a front mount or bottom mount plow? Do you know the brand?
If it's from a company still in business... and the plow is a bottom mount... you may able to get the correct plow mount for your ATV... if not... many make a universal mount that you could make work... as long as you can get it to mate up to the plow push tube... if you have any fabrication skills (or know someone that does)... you can likely make it work regardless...
If it's a front mount plow... it would be much harder To make it work... and likely won't be worth the hassle
If it's from a company still in business... and the plow is a bottom mount... you may able to get the correct plow mount for your ATV... if not... many make a universal mount that you could make work... as long as you can get it to mate up to the plow push tube... if you have any fabrication skills (or know someone that does)... you can likely make it work regardless...
If it's a front mount plow... it would be much harder To make it work... and likely won't be worth the hassle
