Cruise control Servo: 83-96 GM VariousThe small resevior servo unit for various GM vehicles listed below. The one we have been able to supply is Type A.. with the variable ball hole platform as in whats shown in the main illustration. There is a Type A & Type B on these in real life.. check where the chain connects at the front.. both are the same otherwise but .. looks like an adjustable one (Type A Show on the upper picture) with different multiple hole spacing or the single hole as in