Hi. A good buddy of mine brought over a disassembled 348 for me to look at, and it has a peculiar intake included with this pile of parts. It has a heat riser passage under the plenum,but no holes to the carb flange. I think it's a truck intake, it has casting number 3844472 on it. I haven't seen any reference to that number, that's what makes me think its a truck intake. Any verification here?