I'm looking at some Transdapt valve covers, and notice that the short model doesn't have a baffle, and the tall one's do. I'm not sure the tall ones would fit, as there's not a lot of room between the stock valve cover and the power brakes booster. So... how important do you think the baffle is (and is it the same thing as the drip rail I've seen mentioned)? My present engine is a `74 350 ci.