1935 Desoto Airflow manifold heat valve

[Alfa]

I have a 1935 De Soto Airflow 6 (badged as Chrysler for the UK market). I am currently fitting a new exhaust manifold, utilising a brand new casting as the old one had cracked more or less in half. I am busy drilling and tapping holes, but I also need to transfer the hotspot flap from the old to the new manifold. That leads me to two questions.

 

The flap appears to be held onto the spindle by solder in three holes. Is that the case? Can I therefore melt out the solder and be able to withdraw the spindle from the housing?

 

The second is the anchor point for the bi-metallic spring that controls the flap. I seem to have lost the location for the spring in my travails. Does anyone have a drawing that shows how the spring is mounted to the manifold, or even a photo???

 

Thank you for any help you can give.

 

Adam..