Replacing the old Stud Bolts with new items can only improve the quality of the refit and the appearance!
The old items will be stretched with possible damage to the threads, making accurate torque application tricky to say the least!
Other M6 Stud Bolts of the same part code you may wish to consider:
92900060200B
92900060203E
92900060350B
92900060401B
Use new nuts and washers as well. Interfacing worn parts with new is not such a good idea. Order all the seals and other new fasteners at the same time and reduce the shipping costs with one larger order.