Im habing some troubles with mine. I have the 3 needle carb and noticed the msn was out from flush when i got it didnt mess with it and heat cycled it and it broke in fine, but thqt needle just bothered me sitting out like that so i leaned it to flush and richend the lsn same turns to compensate now it starts fine and runs fine until the chassis is entirely heat soaked at that point it idles high no matter how many turns i richen the lsn but will run fine dependent on the lsn and hsn. So i richend the msn back to where it was originally at and everything returned to normal. This has me baffled as my nova's with 3 needles all have the msn flush w/carb body. I can run it like this but its the back of my mind like that msn is not right. Is there something I'm overlooking.