LOWER QUARTER PANEL TO ROCKER PANEL SEAM

Probably been answered before but can someone tell me if the lower quarter panel to rocker panel seam should be filled and smoothed over on an early 71 Duster? I have a couple 73s and the seam is definetly not smoothed over on either of them but the seam on the 71 is, and it appears to be leaded smooth from the factory. If anyone out there with a factory 70-71 can take a look at the seam on their car and let me know it would be greatly appreciated!
Thanks