Jim, assuming the photo on the left is the Aisan, it appears to be more compatible to an adapter. Any data, such as to size of bolt pattern and length of input shaft?View attachment 25838 View attachment 25837 Early GM used the T5 also with a wider bolt pattern, later used the Ford pattern. The other GM RWD 5 speed was the Aisan MA5/AR5 used in Solstice and Colorado pickups. It uses the same pattern as the Toyota Supra R154 transmission.
Bill