Extrude Length

Hi everybody,

Does anybody know if it is possible to  insert a "extrude length" note into a drawing linked to the 3D  operation? I mean, I want to use it to state a bolt with the following  information, THREADxLENGTH, so if I change the bolt thread or length,  the drawing would be updated.

PD: I'm using Solidworks 2010.

Thanks in advance for your wisdom.

SolidworksDrawings And Detailing