340 flywheel on a 360.. Does anyone have the template I need?

Your machine shop should be able to work just fine off the measurements.

A paper template, even if it was absolutely perfect, would only be as good as its "installation" on the flywheel. Setting up off of the measurements should be much more accurate, and if your machine shop can't do that then I would be concerned. All they have to do is determine the center of the flywheel, once that's done it's just drilling three holes using a given radius, spacing and depth.

Printing out a template from that image would be a disaster. It may not even be to scale, and even it if was its tiny. Blowing it up and printing it out while maintaining the scale it has would not be an easy task.