Anyone recommend a very effective anti-heat soak spacer?

>you know gasoline begins to boil at around 95*, right? But it begins to evaporate at temps much below that. I have read tests that show 5% (by weight) of a given quantity of pump gas evaporating; in a 2 hr test at 70*and at 1 atmo.
>Have you got a mechanical fan on that puppy?
I like the 7 blade one. It may blow 200* air across your carb body, but that's a lot cooler than the 400*Plus coming off the headers. Plus with full-time operation, that same 200* air is pushing the 400* air down and out.If your lucky,you can end up with an average underhood temp of 250*
>How about ramming some fresh cold air down the carb? Atmospheric air above the hood,at ambient temp might be at 100* or less. That's a huge deal. I feel real sorry for an engine that has to suck in that 400* underhood air.
>Plus the engine makes a lot less power on that hot air. I always get a kick out of guys talking about keeping their fuel cool, but totally ignore the air temp thing.

Just FYI
I cut a hole in my hood and mounted a nice oval aluminum air filter on top of the hood, no scoop. Then I built a box under the hood and sealed the carb to the underside of the hood. That absolutely killed the tendency for hot running. That engine will now idle all day with a minimum running temp of 205*. The underhood temp,I'm sure could roast a pig in no time at all,lol. But the big DP is cool as a cucumber. But I don't run a paper filter,lol.