Ron, it was totally by happenstance that I looked at the bell housing first thing this morning. I mean, HELLO! How much more precise do you need than the template that is perfect!
This morning at the welding shop, they plasma'd out me a piece to work with. But, one thing most people learn the hard way.. Use a grinder to break through the Plasma film before attempting to use a band saw. The Plasma causes a hardening effect that ruins bandsaw blades almost right away. I just use a thin grinder disc, and hit it in the place I want to cut.