1964 A body 4 speed bellhousing question.

I can do that but I want to see what the actual part looks like before I start or buy one to use as a pattern. Seems like this is a much more common bell . Measuring it from the bell that is in use is difficult.It would be way easier to do with either the part as a pattern or the both bells on the bench. I guess I could use a 273 bell to compare seeing as the ball stud mount for it is the same as the 65 six and 66 six