Rob,
This thread is how I ended up with your suspension 'system' on my 66!
Can also vouch for the superb customer service.
If you are in the drawing mood could I ask you to put something together that explains in pictures how you go about stiffening the chassis on a C10? Right at the beginning of the thread you make reference to it but I cant visualise it - your input would be appreciated.
Regards,
P.