Doug,
Saw that you said the shroud didn't really help w/ cooling; How did you finally fix the overheating?

I've got a 37 Chevy 1/2 ton pickup with a 307 Chevy engine that overheats at idle and slow speeds (cools down just fine to 180 above 15 MPH). Was all set to go with a shroud (vs adding small electric fans) till I saw your post. Any advice?
Thanks,
Mike