Why don't you call the people in charge of the production or GT classes listed in the rule book. Jack has no say in the matter.
The burden of proof is on the entrant as was demonstrated again last year when an EM record was disallowed after going through the method described with the people in charge.
Ask the guy from Utah that thought he did it per the SCTA guidelines.
When asked how I did it , I made reference to the many records I set at both EM and Bonneville.
Those procedures are as valid as ever and apply to everyone across the board.
That is what I was asked and what I answered.
QBTW: The guys at the airport only bought the franchise location from me and wore the authorized uniform.
SECRET FOR GEO.: The 1976 924 is listed as only being produced as a 2+2 Coupe.
With the stock 19-- cc motor it was rated at 138 mph and would be a G class.