For a grid in Wilbur, try View>>Overlay>>Rectangular Grid and set the units to degrees. You'll need to redraw the grid when you redraw the main view area.

The Map Projection window allows you to select a projection, center of projection, and zoom factor. There isn't an offset within the projection, but the user interface for export clips the image size at 1 million by 1 million. The map projection will keep the curvature appropriate to your projection and parameters.