I agree except in hot weather probably work better, the screen under the carb though would definitely help FE in my experience, breaks up fuel and helps distribution with this center mounted carb, center cylinders get much more fuel most likely . back in the 70's someone marketed them as fuel saving device, one of the few that actually worked for a modded engine like this, i made my own and it did definitely work on my 302 , maybe google up carb spacer with screen gasket, I just did , a few patents on it ,
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