I went to Ford parts and said that i wanted to get a replacement EEC-IV (A9L) for my 93 Mustang GT (manual transmission)

The replacement received was labeled (reman) C3W1.

I did some research and soon discovered that C3W1 is for Automatic Transmission.

I called Ford parts the parts person said that the C3W1 is an "updated part number". I asked him to double check and upon checking, he said that the C3W1 is good for both manual & automatic transmissions.

Is he correct? I'm going to have a custom chip burned because of a blower install.

 

Ford parts will have all the information available from a huge ford database via computer and internet. if he said its right, chances are 99.9999% hes right. You could also call another ford dealership and double check.