Dash support tubes question

Hello,

Anyone know the diameter (OD) of the paired dash support tubes in the original cars? Know that they were wrapped in the dash material in the originals which added some thickness but wanted to start with the right size or close to it (planning on using one to run the speedo cable).

Please help

Thanks



I didn't find the right solution from the Internet




References:

www.ffcars.com/forums/160-modifications-originality/494641-dash-support-tubes-question.html

Animated Explainer Videos