ICE install - 430 harness questions

Hi - hope someone can throw some light on where I can pick up these signals please?

1 - Speed pulse wire
2 - Handbrake detect
3 - tacho pulse
4 - reverse gear detect

I'm hoping these are all discrete rather than can-bus supplied. I need (1) and (4) for navigation dead reckoning, (2) to disable video visible to the driver, (3) for radio amplification under acceleration and to install a shift indicator and (4) also to trigger reverse camera and obstacle ranging.

Thanks in advance

Regards
Andrew