Theres no problem in getting it to fit , I've used Zip Ties with small springs to mount Heatsinks where the mounting holes don't match .
But if i need a Fan on the Zalman then it's not worth the effort . Better to just buy a GPU Fan/Heatsink .
Thanks for the help , I don't take any interest in GFX Cards or gaming so i don't know exactly how hot Graphics Card GPU's reach .