I'm getting the engine back together after a rebuild and I so far have only one hole that is missing a bolt of some sort. It is just below and to the pass. side of the oil filler neck in the intermediate housing (see image). Does anything go in this hole?

 

Nope. Looks like that may be an FC center iron (which I've seen a number of times on FD builds) and that's the hole the knock sensor screws into on an FC.

Make sure the hole doesn't go through to the oil fill neck - if it doesn't, you're OK.

Dale

 

Thanks, yet another Pettit problem I discovered during this rebuild.