This depends upon the application. If for example the crystal is pullable i.e. the frequency can be changed by varying the load capacitance of the crystal by electrical means, then this may be difficult to achieve. For example strip blank SMD crystals have a very much lower pullability than the HC49 style round blank package.
This exercise should not be undertaken lightly and if you are in any doubt, contact IQD’s Applications Support department for further advice.