Convertible Frame Stiffening

My 65 has torque boxes from the factory.
Does yours ?

Probably just add some frame connectors.

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.