It's all about oil temps. A vented hood will help keep heat soak out of the bay in general and might drop your oil temps a few degrees, but the critical thing here is to get an oil cooler going if you're having engine heat problems. Nothing else will completely solve the problem.
Unless your normal usage (whatever that might be, commuting or auto-x or ....) is putting your oil temp gauge up in the 250+ range on a regular basis, I wouldn't even worry about it too much, tbh.
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