Here is the instructions for the mid-shift kit.
https://www.tremec.com/anexos/Mid-Sh...sion%20Kit.pdf
Btw I'd order the TKO600RR (has a .82 5th gear. VS .64). Much more usable. Undoubtedly the highest "Wish I'd ordered" sentiment item I see on several forums.
I'm among them but bought my car used.