[392cobra]

I don't think there would be much benefit going from 13 to 17 %.If all else fails,that could be an option.If for nothing else,peace of mind.

Just to be sure,you aren't runnning lean and your timing is correct ? I really don't doubt this has been covered.

Where would I get the stainless steel and what guage for the top shroud ?
The hot engine heat being pulled back thru the front of the radiator without the shroud sounds VERY possible in my case.