Great question!
My own frame stiffening included re-welding with continuous bead every join
in the chassis.
Plus a 6-point cage welded to the chassis. The 6-point cage is mandatory by
most
santioning bodies these days anyway. The cage has additional bracing as
well.
I would have liked to have gone for the forward bars, but I still wanted
scuttle shake and all
those rattles that make our cars so appealing. ;)
I am not sure about Warner's car, but I have heard that the first Group 44
TR6 (that was
actually a rebodied TR250) had round tubing welded to the INSIDE of the main
chassis
box rails, but that may be vicious rumor.
It did make me ponder for a while about cutting open the box rails and
welding in a
honeycomb structure, then closing the box rails for a completely hidden,
stealth structure.
However it would weigh a ton, take forever and I would like to drive my car
before I'm dead!
Shane Ingate, getting stiffer with age, in Maryland (no snide remarks,
please)
"Anyone can restore a car. It takes a real man to cut one up".
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