What is the difference between the torque boxes on the coupe/sportroof and the ones on a convertible? I know they are listed as individual parts, I was just wondering what was different.

 

I'm pretty sure that the convertible torque boxes have a small area cut out to fit around the framerail because the convertible framerails actually extend into the car to provide additional support.

Like this:
______
|........|
|......_|
|.....|
|___|__

The framerail fits into the C area on the right, this would be a torque box for the passenger side.

 

Thanks, I had just assumed the difference was to add more structural support (ie. thicker metal). Has anyone here used a convertible torque box on a coupe/sportroof? If so, is it an extensive modification?

I have not done TB's yet and have never seen a convertible up close. So, I'm having a hard time visualizing the differences between the two. Does anyone have photos of the convertible TB installation?

 

Here's a picture from a 1969 Convertible restoration:
http://www.knowledgeorb.com/Mustang/DSCF1508.JPG
As you can see the inner rocker panel extends into the car, so using a convetible torque box on a coupe would require welding a patch panel to extend the torque box to the coupe's flush rocker panel.

 

Thanks for the pic.

I'm about to do the floorpans and TB's and intend to install weld-in sub-frame connectors, too. I'm a long way from doing the drivetrain, but I'm seriously considering a stroker kit on my 351W 4V....possibly 408. I don't intend to seriously drag the car, maybe an occasional saturday night trip to the track. I mainly want a very strong cruiser.

That said, as long as I'm welding in frame components I just wanted to make the frame as strong as possible, and was considering the possibility that vert TB's might be stronger than coupe TB's. Just thought someone on here might have considered and/or done something like this before.

 

Well National Parts Depot has a set of heavy duty torque boxes that I'm using, I'm pretty sure they're thicker than stock. You can call and ask them, they're very knowledgeable. If you really want to improve rigidity you can get the convertible torque boxes and install the convertible inner rocker panel. That would definately stiffen the chassis and you wouldn't need to modify the conv. torque boxes.

 

Cool, I'll check with them about there TB.