There is a small air gap on each side of the slide that I noticed. Other than that the slide fits great. And like I said, they run good so far. I have a set back now if you would like them. The guy that bought them was told by his builder to use stock size carbs with his port work so i ended up getting them back. I'll send them your way for $35 shipped. No internals with it (floats/jets/choke switch). Heres a pic of the air gap and the carbs incase your interested. They are painted with some metallic paint. You could get it off pretty easy.
Pm me if interested.