To get this class moving and growing, could it be an idea to allow all homologated/approved GT4 cars, and follow the European GT4 regulations found here: https://european.gt4series.com/gb_en/regulations

They use successballast in GT4, I guess that might be tougher to do in a Rallycar, or is that possible?

If possible drivers would have all these cars to choose from:
Nr. Manufacturer Model Since Expiration Developer
RACB GT4-012 Aston Martin V8 Vantage GT4 01-04-2009 31-12-2018 Aston Martin
RACB GT4-015 Lotus Evora 25-07-2011 31-12-2018 Lotus
RACB GT4-019 Ginetta G55 01-04-2014 31-12-2021 Ginetta
RACB GT4-021 KTM X-Bow 02-12-2016 31-12-2023
RACB GT4-027 Ford Mustang GT4 01-08-2017 31-12-2024
RACB GT4-028 SIN R1 01-01-2015 31-12-2022 Matech Concepts
RACB GT4-MC Maserati Gran Turismo MC GT4 01-04-2016 31-12-2020
RACB GT4-030 McLaren 570S 01-01-2017 31-12-2024
RACB GT4-031 Chevrolet Camaro 01-03-2017 31-12-2024 Pratt & Miller[2]
Alpine Alpine A110
Aston Martin Vantage N24
Audi TT
Audi R8 Audi Sport
BMW BMW M3 GT4 BMW Motorsport[3]
BMW M4
BMW Z4 G&A Racing
Chevrolet Corvette C6 Callaway Cars[4]
Ginetta G50 Ginetta
Maserati Maserati Trofeo
Porsche 997 Equipe Verschuur[5]
Chevrolet Camaro Riley Technologies[6]
Porsche Cayman GT4 Clubsport
Porsche Cayman PRO4 GT4 Prosport Performance