Welp, since you don't have a welder... kinda looks like you'll be out Guinea pig. You can always trailer it up to my place to get welded, but the fuel price would be a real concern. I always thought a ½ inch ¾ combo wrench and a welder were required told to own a Mustang

How much overlap will there be containing the adhesive?  That seems to be the question.  Since welding doesn't need much overlap (or any), do you have enough bonding metal surface to produce the hold required?

Another thing some don't realize about JB Weld is that it becomes putty like at 600 degrees, so if you need to remove it and the area can be heated it is fairly easy to remove.  I've had to do this before and it removed fine.  The other epoxies probably behave the same but I only have experience removing JB Weld.

Sorry, I didn't explain, For medical reasons I can't be around welding. Doc says there is a chance I will be pushen up daises if i'm any where near welding. I was thinking along the lines of this stuff....But I will look for a welder.

(https://www.summitracing.com/parts/tes-7000000610?rrec=true)

I bonded my cowl and my roof skin on my 66 coupe.  I used I think 3M 8115.  I had my buddy who’s been auto body since I’ve known him guide me.   Sealed for life and no seam rusting.

I don’t know if you are on Facebook, but my daughter-in-law uses a “neighborhood” site that many people will post for a handyman, plumber, etc, etc.  Maybe you, or someone you know, could post for someone with a MIG welder to do the welding for you, at your place.  
Or a local body shop may have an employee with his own MIG that would be interested.
Just a thought.

The panel bond that professionals use is pretty amazing.  Very strong IF done correct!  I spend a lot of time in my friends body shop and see a lot of things that are glued together.  When he replaces a bedside on a pickup truck if I remember correctly, all horizontal surfaces are panel bonded and all the vertical are welded.  and I think most factory ones are welded in.  Like one of the other guys stated the new aluminum F150s are riveted and bonded together.  Right now he has a brand new F150 from Pennsylvania that a guy just bought and took a hunting trip out west.  While returning home he hit a deer on the interstate.  About $23000.00 later its good as new!  I've watched him rebuild this truck and am amazed how theses new vehicles are put together.  With that F150 there is a tubular brace that runs from the side of the firewall down to the bottom of the radiator support..  Right below where that support is riveted to the radiator support there is an airbag sensor.  When the collision happened it ripped that tubular support loose from the radiator support and folded it backwards.  During the folding back movement it sheared off the wires from that sensor BEFORE it deployed the airbags.  Had it deployed the airbags the bill would have almost doubled.
With that said If I was replacing the radiator support in my 65 I'd probably have someone weld the new one in.