Short action bolt heads are different than long action. You'll have to get a push feed short action magnum bolt head and short action magnum firing pin from SSS.

You'll also have to get a large shank barrel turned down to small shank or get a custom barrel made.

The need for a new stock depends on the contour barrel you get and if your willing to modify it to fit the barrel contour.

Midway has a short action push feed magnum complete bolt, but only in left hand. ::)