I'm Heartbroken. Time to face reality that my Cuda is a parts car.

Doing a full main floor change is easy man. I have an article on how to drill and pop spotwelds. When iinstalling the main floorpan you need to remove the doors, steering column, and roll down the quarter windows. It fits right in thru the door opening.

If you doing a transition pan and main floor the transition pan goes in first, so you cut back the floor pan, pull and replace the transition pan, then overlap your new floor pan.

Fit the parts and use self tapping screws to hold them so you can weld, then remove the screws and fill the holes.

Look at a lot of build threads. I got my transition pan and inner wheelhouses from a 1970 scamp parts car.

I have 2 build threads for some metalwork ideas for you.

My 1967 barracuda
67/68/69 cuda dilemma

Read a lot of build threads. See how others have done the sheetmetal work. Many ways to accomplish the same thing. As a matter of fact I think my used spare well I got from here cost me $50, ditto for my rust free LH inner fenderwell. Sometimes when you get into it some stuff isnt as bad as it looks. BTW AMD does make both A/C and non A/C firewalls for these cars. Between that and a main floor plan that licks some issues, And you can always splice in a windshield A pillar as long as you measure and brace it well first so nothing moves.

You got to remember it's now a 50 year old car. These things were made to last 10-15 years when they were new. Its beaten the odds, and AMD and Goodmark have everything you need, well maybe not everything, but a great deal of it.

Use the search function on FABO, and surf a lot of build threads. Get a lot of ideas. Show us some good pix of the issue it has. Chances are many on here have solved those very problems and can guide you thru it all.