Okay...lots of hard work was put in this weekend on the B13 (now I call it El Blanco Diablo).

Big thanks to Toolapcfan (Rob) for all the help. We got the old motor out and installed the replacement P/S rack from a donor car. We had a battle with replacing tie rod ends however.
The motor is now dropped in, but I'm missing a bolt. One of the rear tranny mount bolts has been misplaced. It's the one that goes in the middle which is slightly difficult to get to. Can someone tell me which bolt this is? Maybe I can find another bolt that will work.

Any help would be appreciated. I can't find any exploded views from the online B13 repair guide I have.