Refrig Vent and Awning HELP!

[markdoane]

I am installing a refrigerator vent on my '59 tradewind and I am unsure of the best location.

I have an awning rail, but no awning. I haven't decided whether to install a vintage awning, or go to a modern Zip-Dee.

Questions:

1. Can I use the original awning rail with a Zip-Dee, or does the Zip-Dee use a different awning rail?

2. I want to avoid problems with the door scraping the bottom of the awning. If I install a Zip-Dee, how high should the awning rail be above the door eyebrow?

3. How far above the awning rail should the refrigerator vent be located?

Here is a picture that shows the current awning rail and the expected location for the refrigerator vent (in white).

Thanks for any help.