Paul,
       I don't have a drawing as yet. I will try to make  one this weekend
 and send it to you. I lack CAD skills so will leave that to you. Other than
 the two extra holes at top of rear housing and one less on plug side as I said
 the bolt pattern is same as 86-91(actually 74-91). End user could add the extra
 top holes very easily and not use the extra hole on plug side if starter is
 left on exhaust side.

      Kelly

Kelly, Sometimes the easy way is to tape a sheet of paper on the part, rub the holes and edges with a pencil to bring up the edge outlines, take it off, mark the centers and then draw straight lines between common features Once a pattern is worked out you can measure this quite accurately.
...Chrissi
Cozy Mk-IV 13B-turbo
www.CozyGirrrl.com

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