“She’s real fine, my 4-0-9,” sang the Beach Boys in the early 1960s. For car enthusiasts who grew up in that era, they do regard Chevrolet cars from 1958-1965 as fine indeed.So at the 348/409 National Convention this weekend, fans from as far away as New Zealand, Canada and Australia congregated at the Sunflower Rod and Custom Association Drag Strip at the Expo Complex to race, swap stories and remember the good old days.“348/409 refers to the size of the engine,” said Phil Reed who coordinated the convention. This is the second 348/409 convention held to show cars that definitely have some “giddy up.”