Autopilot Configuration Question

Hi Chuck,

When the boat was purchased following autopilot equipment had been installed on my '97 Sea Ray:

Type 100 Autopilot Control Unit
Raychart 610EST Course Computer
Raypilot 650 Autopilot Control Head
Fluxgate Compass
Rudder Reference Indicator
A70D Chart Plotter (interfaced with NMEA0183 to ACU)

The 610EST and the Raypilot 650 were not hooked up or working and have been removed.

I will be upgrading shortly to an eS series fishfinder/chart plotter with Quantum radar in the near future.

My question is, using the remaining existing equipment, is it possible to achieve a working autopilot system?

Thanks for your help.
Neal