[digginfool]

It's no big deal (if you don't mind dual hoops) and only applies to novice drivers. Here is the rule to drive your Cobra at a Chin event.

"It is a great undertaking for an enthusiast to take on the challenge of building one of the various do-it-yourself Cobra kit replicars. It is one of the all-time great sports car profiles... however, having good-looks alone does not make a car safe for the track. Features like non-structural fiberglass doors, non-load bearing windshield frames with no roll-over protection, and half-seats that do not provide head/neck support are a serious concern.

A new Cobra owner may be very enthusiastic about getting some track experience. In the Chin Motorsports program, that means one of our staff instructors would be assigned to provide in-car advanced driver coaching while riding along in the right seat. At every event, riding in the right seat of an entry-level driver, our instructors make a great leap-of-faith and commitment to keep a novice driver safe, and to put their own personal safety in the hands of that driver. Many Cobras with well-prepared V8s are capable of 120+mph in use at the track. So, under those circumstances, to be properly prepared to use at the track, Chin Motorsports mandates the following requirements for a novice driver using a Cobra replicar:
structural roll-over hoops behind both seats, or full roll-bar similar to Factory Five Spec.
seats and restraints must be identical for driver and passenger
side mirrors on left and right, in addition to dash-mounted rear-view mirror.
For an experienced driver that has been solo-qualified, there is no requirement for an instructor to ride along. So, you can use a Cobra and be exempt from these requirements. However, passengers will not be permitted if the car is not in compliance with the guidelines above.

Drive Well, The management"