KU's Puzzle #1578 - Unicorn H-Modified

[Otto Puzzell]

Know what it is?

Please, respond below and share your knowledge of what this is, and who built it.
As always, detailed answers are greatly appreciated by all. 
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Also, please be sure to check out our other puzzles, and, please post a puzzle of your own if you'd like - the more, the merrier.

Thanks!

[Otto Puzzell]

Racing to the experts!

[gilescooperuk]

Lotus 6

[metalshapes]

This Crosley-powered 'Unicorn' vintage race car was built in 1952 in San Francisco and is one of the oldest known H-Mod cars.

[Otto Puzzell]

Not many of these "racing special" puzzles are safe with metalshapes around!