I should have mentioned that I have all the parts for the ARC400A.
ARC A/P Computer Amp p/n 37970-0328
ARC A/P Controller p/n 37960-1028
ARC Trim Servo p/n PA520B
ARC Trim Sensor p/n DT-520A
ARC Trim Regulator p/n 1270723-6
Autopilot Relay assembly
Burt
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