A 1974 Duster - My 2nd one, 41 years later!
Passenger side welded in. The trick I found to welding the thin floor pan to the new sub frame connector is switch from .035 to .023 wire and lower the setting, drag the weld bead from the frame connector into the floor. This way it doesn't burn through the floor. Little shot of paint....but will need some more painting/undercoating to clean up all the old looking spots. Looks like I will have to deal with making a new "hook" spot for the E brake cable rod that is on the passenger side trans crossmember also.
IMG_3038 by
Alexl5280, on Flickr
IMG_3039 by
Alexl5280, on Flickr