Looking for some rule clarification on switches.

I just picked up a 1st Gen Mazda RX7 that I will be racing in ITA class..

The steering column combination switch (wipers, lights, etc.) is questionable. The left side cover is missing and the sitch is safety wired is to hold it together/ in place - funtionality of switches marginal.

The center console (radio, temp controls area) has a coverplate over it with 3 aux gauges(WT/OT/OP) and 2 Aux switches (electric fuel pump and electric radiator fan).

I plan on replacing the 3 gauges and 2 switches on the center console with new better quality items for better accuracy and reliability.

My question deals with the steering column combination switch. Can I add:
- Additional new toggle switches on the center console for the ignition and a start button (and remove the original keyed switch from the column).
- Additional new toggle switches on the center console for the lights and wipers (and remove the questionalble combination switch form the seering colum or does it need to stay there w/ levers and just be inactive).

Just looking to add some reliability into the misc. switches, keeping the functionality of all the switched items.

Thank you for your help,
Mitch