KR> Correct Bolts for Diehl Case

[rick...@comcast.net]

I have a Type 1 VW and it's connected to the Diehl case with two studs at the 
bottom and two bolts at the top. One of the bolts has a tapered shank because 
the case hole (top left) is larger. Two questions: 1. Why is the one mounting 
hole larger? and 2. What are the correct fasteners all around?