No fender welt on the rear but I added it for the reason as stated above.
https://www.flickr.com/photos/advance-design_parts_co/45162016551/in/album-72157698936735772/
There is fender welt on the front and also a gasket set for the inner fenders is sold by most of the vendors (8-piece set, inner fender seals).
https://www.flickr.com/photos/advance-design_parts_co/43664553840/in/album-72157699447075222/