Convertible Frame Stiffening

There is some bracing in the corners, but I'm not sure they could be called torque boxes...at least they are not like I've seen on aftermarket, or modified stock frames.

I read somewhere that frame connectors might not fit convertibles and that's why I asked the question. I've heard several opinions, but no actual results from anyone that tried improving convertible frames.

Well they are...:yawinkle:
Those are torque boxes.
Next step would be to tie in some frame connectors.
Get those in and you should be good to go.