1968 Front Subframe Replacement

Hey Mustang People. I hope someone here can and will help me with a friends project. 1968 Coupe. Mostly a survivor. However it lived in Ohio.

The front sub frame is rusted through on both sides. We are working on this car almost every Friday night for about 3 hours. From what I can see I have to tear everything on the front of the car off. The fenders (inner and outer), suspension, engine etc.

I’m looking for an exploded view of the sub frame parts. His is rusted from the bumper all the way under the floor pans.

My level of experience: I owned and built a 69 Mustang almost 20 years ago. I am a Heavy Duty Truck Tech. I currently have a 73F100, and a few VW projects. I can mig and arc weld. Basic fabrication and machining skills. I own and know how to use a tape measure and level.

I believe that this is part of what I need, but it isn’t complete.
CJ Pony Parts.

I’ll get him to order a NPD catalog this week in hopes I can find something there. I’m still in research stage (you tube, google).

Another concern I have is removing the old subframe under the car without burning through the pans. If anyone has done this job, please post some tips or PM me. Switching it to a Mustang 2 is out of the question. Bolting on tubular isn’t gonna happen. Wanna stay original.

I’ll try posting a few crappy cell pics I have. I do have a YouTube channel of my own, so I’ll post some of the car there (link in this thread) once I come out of the editing room with it.

The car now lives in Texas. So hopefully this will be the only time I have to fix the rust.
Thanks in Advance

That’s almost exactly what I was looking for. I didn’t know what the torque boxes were called.

Is there a specific supplier that you’d recommend?

Thank you so much.

Update time. We work on this car a few hours almost every Friday. We removed all outer sheet metal and made a few discoveries. Please forgive me for swearing like this, but I’m used to old Chevy sub frames that just bolt on. Because of that the front subframe isn’t as rusted as we thought. The worst parts are at the bumper bracket mounts. I believe I can plate this if need be.

It’s the long boxes under the floor pan that are rusted out (not the torque boxes). I included a NPD catalog pic of what I think they are. The inner floor frame supports.

So here are my questions.

1. Am I right about the part? (Rusted pic provided)

2. Can I replace it independently without having to remove the subframe?

Thanks