New Rear Body Panel: Leave factory seams or finish smooth?

Happy New Year everyone!
Just working on my 67 cuda today, ready to weld on my new rear body panel and was considering whether to finish it off as the factory did with seam sealer at the quarters or finish it smooth with no visible seams?
This car is very solid but is not an all original car nor is it intended to be, at this point at least. I am trying not to molest it too bad in case someone else somewhere down the line wants to return it to factory.

Just looking for general opinions and perhaps some photos of some smooth-finished ones. I kind of like the idea of smoothing it all out.

ps.... I am installing the '68 panel that has the dual exhaust cutouts.

Thanks!