I'm running a 600 edelbrock stock outta the box on my I6 292...has an HEI and headers, but all stock after that. Starts right up hot or cold..course..carb doesn't have a ton of miles either...I let mine sit for..oh...couple hours...and that's when I had a hard time starting...mainly cause I made the mistake of choking it, but putting the pedal to the floor cleared things right up. lol Maybe I'll look into one of those spacers.