If you have the stock valve covers on your engine and an available stock 4 barrel intake, the following pics may help you compare carb heights on a few various intakes. I took these pics a few years ago but never did get a measurement on a stock cast iron 4 barrel. These pics are all of a 440 and include a stock aluminum 6 pack, an edelbrock performer rpm, an edelbrock performer, a 2836150 aluminum intake, and an older "over the counter" mopar aluminum intake. All measurements taken from carb surface to valve cover. jess