Need to add speed limiter to toyota quantam 2.7

[nonstarterautos]

Hi guys

Is it possible to add speed limiter to toyota quantam 2.7. Need the limit to be at 120km. Has denson ecu in. Can someone tell me if it's possible and what tool can I read ecu if it's possible.

Tia

[nonstarterautos]

Anyone ever do something like this before