At the time I built this car only Felpro made a computer for Indy cars and top fuel funny car dragsters that would work. Today there are a number of makers out there. including TSI However, you will have to rewire the trans to make it like the GM set up. Again, when I was building this car. Only the 3.9 belt drive engine was readily available. Today I would go with the 4.2 liter get the 4.6 crank for $350 . and get the engine with the surpentine belt. Use an aftermarket HP cam shaft and after market computer to control fuel delivery and timing. There is one other possibility, th at if it work would make this very simple. as long as go with the stock engine. The Rover uses the same transmission electronics. You could in theory get a ROver engine and including the engine and trans computer. If you are lucky it might plug into the trans and work just find. Again this is recent stuff, after I built the car. I an comtemplating building another one with this updated stuff. But i would have to sell my stock 81 automatic to afford it. Let me know what you are going to do. bob