I had to help make some improvements on the engine harness for the idle Regulate valve. I'd at first planned to work with a two wire bimetallic type valve, but I is going to be employing a Screw-in style idle Handle valve. This valve works by using a stepper motor https://blacktop20v4age00864.full-design.com/detailed-notes-on-4age-20v-blacktop-for-sale-81670894