LMC floor pans

[rustyrodknocker]

I just recieved the parts to rebuild the drivers floor in the 66 burb. On the main floor pan the front edge that meets the cab panel at about the bottom of the gas pedal is missing the return to allow it to fit up to the factory spot welded and sealed joint.

I'm wondering how guys are making this joint. I was thinking just cutting off the opposite flange and butt welding it, if the patch is long enough to do so.

Is there any reason not to do something like this?