Can the T-56 be replaced with an automatic?
Yes. A number of people have swapped for a 4r70w automatic. It is actually a good swap, especially for racing. Hermann (Horsepower By Herman in Tampa, FL) has done swaps. Give Hermann a call at 813-241-2783 for more information. Here is an excellent link on SVTPerformance.com that explains what is required for the conversion. How To Install An Automatic In A Terminator.