According to
Mazworx's installation instructions:
How to tell the difference between an NA and TT trans.
1. The speedo gear on the NA is red and purple on the TT.
2. Measure the bellhousing thickness at the slave cylinder hole, the NA is about
½” and the TT is about 5/8”
3. If you have an NA trans, the you will have to use a
spacer for the starter.
Xcessive makes a spacer for the starter and Mazworx includes one with their swap kit.