Help with K Frame ID-Solid bottom plate....

It looks like it came off one of the dukes of Hazzard jump cars

SOOOO Wrong. The Dukes of Hazzard used a B-Body!
It would have been more astute if you noticed the areas welded up for reinforcement ie....
Steering Box gussets, LCA and edges for function before form since its going ON a Dukes of Hazzard B-Cuda. :-)

Thanks for everyone elses input.