IAC ref: T Cloud Arizona Speed & Marine (602) 437-2520 They show two interesting parts no.s but no pics in the catalog 74769 Idle speed motor housing with gasket $60 74770 Idle speed contro motor adapter plate $32.65 Might look at the GN/T-Type want ads for a junk TB to rob housing off of. Just use a experimenter's stepper motor kit to contol it. HTH Bruce nacelp at bright.net