I inherited a working 904 transmission along with a lot of other parts for a 1969 Barracuda project car. The transmission came out of a late 80's Dodge van, along with the 318 engine. The seller did not know anything about different engine/transmission models. In checking to see if it is a lock up TC, I counted the splines on the input shaft at 27. According to a Mopar Tech Archive article, this makes it a non-lock up model. However, it also has a short non-splined section on the front of the input shaft and a hole in the center of the shaft. According to another thread on this forum, this makes it a lock up model. How can I tell for sure, and what are my options if it is a lock up model? Use as is (performance not an issue)? Some way to trick it? Other? Thanks.