I did this modification to my F
The bracing bars and bracket are for sale in my other thread
Click Here, brace is on page 3.
To fix the bars you need the L shaped bracket to fix to the bulkhead between the engine and boot. The two bars overlap and are fixed to the bracket. The other ends are fixed by bolts through the engine cover to the underside of the body above the engine. You replace two of the existing bolts with larger ones which fix onto the nut welded on the ends of the bars.
Just found the original thread I started after fitting the brace,
Click here for TOPIC: I played with it, now it's gone stiff !