Should i replace whole quarter panel (have NOS) or cut and weld patch using NOS panel ??
About 2 inches on wheel well is cancered out
outer wheelwell unknown
lower area shot along with trunk extension See Pics
Car parked in 1985 Gave myself 2 years to restore or sold
70 340 swinger 4sp 3.91 * plum crazy, black interior, white vinyl top
Any Body men close to NEPA that can/would do welding ??

thanks tom

another pic

last pic

You have full NOS quarter panels? Man.. I would be tempted to use them. I guess the other options would be to patch and sell the NOS stuff for likely some pretty good money. Based on the pics you will likely be patching/replacing the outer wheel house and trunk extensions.

I used skins on my Dart, because the full quarters were not available, and would have much preferred to use the full quarter.

You have a full NOS quarter and you want to turn it into a patch ??? I'd be popping that 1/4 off in a heartbeat and fixing any and all rust that maybe hiding under it .

Sell NOS pocket extra coin, buy full AMD, install....no brainer

Sell the NOS 1/4 to someone who really needs it and repair your 1/4. That rust is pretty minor.
A lot of people seem to think putting a full 1/4 on is the best thing. Really think it over.
Here are some things to consider:
when installing a full 1/4 you must remove the back glass, remove or at least partially remove the headliner. Melt out the lead at the sail panel, and then either relead or body fill the roof joint. You would also have to roll back the vinyl roof on cars equipped with one.
Also you would need to redo all the sound deadener and try to make it as thick and accurate as the original. Are you doing just one side? Hard to make things identical if only doing one side.
Consider buying a skin from AMD. When installing a skin, there is far less disassembly and if it is buttwelded in place, it is a quality repair with minimal filler needed. Far less intrusive too. I personally only like to install full 1/4's when the car really needs them. I prefer to retain as much of the cars original metal and integrity as possible. I have installed dozens of Mopar 1/4's, both full and skins, and would choose skins for my own in nearly every case.
If you choose to just patch in the lower rust, use the AMD skin. Even though that rust appears small, it will be thin in spots you can't see from the outside. Buy the trunk floor extension too since it looks like you will need it. They fit great and if you don't want to disturb the factory joint to the floor and seam sealer etc you can splice it in about 1/2" down if you want to. Another benefit to replacing the skin over just patching the bottom is you will have the inners exposed and can properly deal with hidden rust and all the 40+ years of debris that is lurking behind. Patching it in down low will result in lots of body filler required because Darts are so flat and difficult to weld on the sides without distortion. My recommendation is to do an AMD skin at the top line where it folds over. It's a strong area to weld, and will require very minimal filler to finish. This is work that is best left to professionals unless you are experienced in panel replacement and welding. Don't even consider hacking up an NOS 1/4!!!!!!!!!

Thanks
I should have mentioned that the car is totally apart
Only items left is rear window and headliner
(took car apart> settled divorce for car > WORKED)
I bought an auto body specs skin and trunk extention over 5+ years ago the gas filler area is not centered and it is not punched correctly (rounded flange area where filler tube attaches)
also the trunk extension doesnt fit @ bottom (too large) and the marker light location is off
found the nos on craigs list for 800.00 thinking easier to replace than cut & weld patches
Was certified stick welder 20 yrs ago but forced out can't weld (health issues)

Looked @ AMD @ carlisle they are off in gas filler area also but otherwise look good

the other side is not as bad but in the same areas
(should I do BOTH at the same time ??)
as i said car is totally dismantled except noted above
car does have a 1> 1-1/2 pitting across cowl (have spare cowl)
floor /trunk VG only slight surface rust heavy ubdercoat also
Had 3 other darts (6 cyl) saved lots of parts
I looked at this car for too long want to drive/enjoy it
The so called profs in my area are only into collision work i've been looking over two years lots of promises no back up

I was also thinking of starting a project thread as I have tons of pics in order to get some feed back
Oh! the dart is also # matching

thanks back to drawing board

Yes do both side at the same time , only makes sense especially if the car is apart.

If you are REALLY good at partial panel replacement, AND
the lower rear windshield corner is good... then patch them.

If you are not, and/or the rear windshield needs repair,
then, for the best possible results in the least amount of time, I would opt to replace the entire quarter panel with the NOS piece.

While the Quarter is off of the car,
Replace the outer wheel house and the trunk extension...
(with AMD pieces) if available...
I'm sure those two pieces are rotted out at the mating flanges
since the quarter is rotted out there.

If the car is a 2 door hardtop, I would use some square tube welded braces on the door jam to keep it from moving while the quarter is off of the car. If both sides of the car are similar
Do one side of the car at a time...

Make sure your gaps are straight before you remove the quarter and take quite a few pictures of all gaps. Obvioulsy keep the doors on the car....

Best of luck to you....