It is wY easier if you pull the middle gear cover but it can be done without it. Do not try and get by without using a gasket it will bind with just sealer.
I have a Gen 1 taillight surround made of aluminum and chromed . I also have a tach cluster cover made of aluminum and polished. I am asking 500 for the pair. I was not sure on prices on these and Sean Morley helped me out .