Aod trannys are lock-up unless modified to be non lock-up.
Precision Industries makes non lock-up converters that will work with your factory set-up (no other modifications required), or, if you have a one-piece input shaft (which eliminates lock-up, regardless of converter type) they spline the converter differently. A B&M converter may be cheap, but I dont think it will give you the performance your looking for. Call PI with your questions, they customer service is very helpful and patient. try
www.converter.com
------------------
1993 GT/AOD
'93 Mustang GT