Thanks John. Unfortunately the FIA are a bit more specific than that. They have a set of regulations drawn up for each individual make and model of car to have competed in international touring car competition. The regulations are based on the original FIA homologation sheet for that make/model. So, for example, a 1965 Mustang has its own homologation sheet, a 1967 Camaro has its own homologation sheet, etc. That homologation sheet tells a car builder exactly the modifications can be carried out on that car.

But the homologation sheets are based on more widely used regulations of the period, such as Group 2 as used in the UK and Europe in the 1970s, or SCCA Trans-Am from the late 1960s etc. These were classed as international touring car formulas. And each car that competed in these various championships were given a homologation sheet, which now in FIA Historic Appendix K, car builders must use.

They provide some different options, for different cars. For example, Chrysler in the US entered the Trans-Am championship in 1970, with the Plymouth Cuda factory team run by Dan Gurneys All American Racers, and driven by Gurney and Swede Savage. Trans-Am rules required the engines be no bigger than 5 litres, and the wheel sizes be no bigger than 15" x 8". But following the 1970 Trans-Am, one of these Cudas was sold to Chrysler France, and it was raced in the Europe Touring Car Championship and the French Touring Car Championship. But it raced under Group 2 rules which were more relaxed, and allowed for more modifications. So the Cuda was fitted with wider wheels, and a big block Hemi.

So now, if you want to build and race a 1970 Plymouth Cuda in the UK or Europe to Appendix K rules, there is a homologation sheet which allows you to build the car either to SCCA Trans-Am rules, or FIA Group 2 rules. But less common cars that competed in only national championships don't always have a homologation sheet. The Holden Monaro is one of these. There were Monaros that raced at events in which there was an international championship taking place, such as Formula 5000, but the Monaros themselves weren't competing in an FIA recognised international touring car championship.

There is a homologation sheet for the Holden Commodore, because this model competed in the ETCC in 1986 and 1987. But most other Australian makes don't have one.

But the Appendix K rules do say that if a car not recognised as having an international competition history, can be accepted for Appendix K if proof can be given that it competed in a national championship of importance. So, for example, Bob Jane raced an HQ Monaro in the 1972 ATCC. But then evidence must be provided as to the specifications of that model. Fortunately, there were at least two period magazine articles written on the Bob Jane Monaro, which state many of its modifications, and show pictures which help with evidence.

So you have to prove your case to the FIA before you are accepted. But even then its not so easy. With Eric and his Camaro, even though the SCCA allowed dry sump systems in the Trans-Am from 1971, its not OK to actually fit a dry sump system into a Camaro under Appendix K rules unless proof is given that someone in 1971 actually did this.

There are lots of hoops to jump through!