Some time back, on this forum I think, another member shared the method he used to strengthen the body of his SII by welding a number of bars in and around the engine bay. I did not pay much attention to this then.
The matter of body strengthening crept up again when inspecting the underpinnings of a friend’s AM DB7: there is a massive brace frame under there!!
What is the current wisdom re this matter for a XJ6 C ?