[BrianF1960]

A few things I can tell you:

1) You'll need a Boxster tip, not 996 tip due to the engine layout (a 996 tip has a reverse layout as the tranny is in front of the engine.

2) If you can find a tip Boxster to look at, the tranny is right behind the engine and in front of the muffler (the muffler bracket is attached to the back of the tranny). You should be able to measure whatever you need as it's very accessible.

The tip tranny is very compact and should fit into the 914 well. Heck, a friend had a Chevy V8 and Corvette 4 speed dropped in his 914 back in the late 70's and it all fit with only some new mounting points and some exhaust and header customizations.