How to transfer selected Mesh onto another area on the same Mesh

Question

I'm trying to to transfer the selected mesh into the designated area its a curved surface and its making it hard for me to get it in place. What method would be best to get it in place?

Answer 1

Your topology is probably not the best but you can have a good result nevertheless:

Just duplicate the part you want to copy, mirror it, rotate it a bit so that it can fit the hole correctly, join the vertices with the Snapping and Auto Merge options:

Also don't forget to recalculate the normals. It still won't look perfect but you can duplicate the vertices all around the (former) hole, separate this mesh as a new object, grid fill to create a plane:

Now you can use this plane as the target of a Shrinkwrap with these selected vertices as group so that only them stick to the target:

Then apply the Shrinkwrap, activate the Subdivision Surface.