SCCA General Competition Rules
The Trans-American Championship is an annual series of events for Sedan Category automobiles to determine a manufacturer champion in over-2-liter and in under-2-liter cars. The events were held under the SCCA General Competition Rules. In August 1969 the rules for 1970 were revised, presumably to the satisfaction of various interested Detroit parties. At the meeting the production levels necessary to meet homologation requirements were agreed upon. The deadline was set as 10 days prior to the first race of the season. For any model to be eligible, the quantity actually built had to equal 1/250th of the total 1969 production for that company, with a minimum of 2500.
Minimum Production required
| Company | Production for 1970 (until April 9, 1970) |
| Chevrolet Camaro | 8200 |
| Ford Mustang | 7000 |
| Dodge Challenger | 2800 |
| AMC Javelin | 2500 |
| Plymouth AAR 'Cuda | 2500 |
Deadline was extended
To complicate matters, the Camaro wasn't even introduced until after the first of the year, and other companies were also lagging badly. Plymouth and Dodge officially started their production March 10, 1970 and were still producing during the first race weekend. John Timanus was the technical administrator of the SCCA who had to verify such production.
Pre-Race Technical Inspection
On Friday April 17, 1970 technical inspection started in Monterey. All the factory teams had modifications on their cars which had to be cleared. All in all, 21 cars were inspected and approved for the over-2-liters event.