[Matra et Alpine]

Contacts on a small switch are too small to be realiable.
LARGE current flows from the battery on starting and good chance you'll weld a throw switch closed
There are reasons why race/rally regs require the "standard switch".
Small switch like the one you want to use are normal on the iginition circuit -- whcih is low current -- NOT the main battery.
Also, re comment earlier about marshalls ..... BIG RED KNOB is easier to turn than tiny little switch - especially if suited up in fireproof gloves !!
If you dont' want the big red bit showing during nevery day use, then do as the Porsech did. That red wire loop is connected to the red switch under the bonnet. You pull on the wire and it rotates the switch !