I agree. It is a great idea. I just looked my windshield opening to see if the paint around the inlet hole could withstand that remedy. I think it would be too risky.
Didn't get much done on Sparky today. Too much yard work got in the way.
The drain is soldered in place so I would be very reluctant to change it at your stage in the restoration. I don't really think it as that relevant with a pampered classic as it will never be subject to long periods out in the weather.