Haven't used them personally, but i've seen them used by other people, and they fit awesome on low deck motor's, 383, 400! I met a guy at a car show with a 383 68 dart, and he showed me his setup, they cleared very nice, and after seeing it, I would use them for sure. Don't think they would be a great idea for a really built high performance engine, but a great alternative for a mild build or stock build low deck.
