Ok, if you hadn't found it yet, I found a place that sells a conversion for those of us with an electronic speedometer trying to use a mechanical output T-case. They sell a transducer and an ERA. Used in combination, they provide the computer with the signal it needs to function properly. The company is called Abbott Enterprises and the number is (800)-643-5973. I've got the part numbers and prices, so if you want them, just respond to the post.