Converting Female to Male upper body.

Fairly new to Sims4, Studio and Blender.  I have already created a texture for some pants, on PSPx8.  I am reasonably familiar with 3D Crafter, however no import/export support for blender files. Blender seems a lot more harder to grasp.  My modding request is to convert a female top with jacket to fit a male.  In Sims4 the female top can be placed on the male, but the torso size where it joins the neck and waist don't match.  I have already tried this in Blender by deleting the top of a male, saving.  Deleting the female body, and just saving the top.  Back to the male, and the only way I can find to add the female torso is to 'link' but then the linked object you cant do any editing, like moving or re-sizing, as this editing is greyed out?  The Blender menu seems to have no way to merge an object or import a blender file on the existing mesh, other than the 'link' way?  Maybe there is an easier way to convert a female top to male?  Any help, PLEASE.