Does anyone have a clue what formula car, possibly FSV, these uprights may have come from. It's a total mystery to me but they seem to work on this Caldwell D10 basket case that I'm trying to restore.

I know that all of the D10's I have seen use all D9 rear uprights, chassis, and most other parts but this car is completely different. It looks like the Autodynamics Caldwell D10 FSV show car that Ray built. The picture is in Andrew Schupack's book "Formula Vee/Super Vee Racing History and Chassis/Engine Prep" on page 54. Any help would be greatly appreciated..............

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