Hi John,
I hope that you are an experience body shop technician, if you ere not, I strongly suggest not to attempt to do the work your self. To do the job properly you will need to expend many hours removing factory spot welds, aligning panel’s etcetera. I am in the process of doing a restoration on a 1967 230SL and I consider my self a good technician; I have all the tools, the room to work, a very good frame jig, spot, tig and mig welders.
After spending more hours that I care to tell you on this project, I wish a have given the car to a body shop. The K&K panels are O.K. but they are not a perfect fit, you need to trim and adjust the panels as they did originally at the factory.
John O. Salazar