I'm planning on using a GM type 1227747 TBI unit on my jeep. It's a fairly easy swap and am planning to acquire the parts from a junk yard. I was wondering if anyone could tell me how to ID definitively a GM ECM 1227747 unit. I.E. are there any special markings or where could I expect to see 1227747 stamped. Thanks Omer Ozkul obond@mit.edu