You can have the linked body ready in the template part, so you only have to select the new target body.
There is more benefit if the new target part file is saved as from the previous part file, so the CAM objects, that depend on faces and edges will be updated to use the new geometry.
More or less similar to a CAM template for a part family member.
Production: NX10.0.3, VERICUT 8.0, FBM, MRL 3.1.4 | TcUA 10.1 MP7 Patch 0 (10.1.7.0) | TcVis 10.1
Development: VB.NET, Tcl/Tk Testing: NX11.0 EAP, NX12.0 EAP
How to Get the Most from Your Signature in the Community