We second what our friend Jake J said: Yes to all.
The 396 is "known to work" with the EFIS-D10A for driving an AP.
The "AP remote switch" is the yellow "Servo Disconnect / Control Wheel Steering" wire on each servo.
You will need to fabricate your own mounting brackets, wire your own harnesses, etc.
Will 696 work with dynon ap?
D10a
Ap74
Sv32 servos
Is autopilot remote switch to stick available?
Installation will be on my Lancair 236/320
Issue: are there other parts I need?
Do I need DSAB unit?