Headers shooting flames?

Ok so before I get crazy with jetting and such, i'll try you guys. Got a small block 350 with mild cam, 202 heads and lake style headers with baffles in them. When I get on it hard I get small constant flame from the header. It's just at the end of the header and doesn't breech the end. Plugs look great. Running a edelbrock 600 (1406) stock jets and I just adjusted the float to stock position today. Any help, where should I start?
Is this standard for short headers at high rpm?
Who's got a similar setup?
Thanks

 

Are the flames coming out of both headers or just one? Normally I would suspect a bent/sticking /burned exhaust valve if the flames are only coming out one side and otherwise the motor was running O.K. I wouldn't think that the motor would run very well if it were rich enough to dump fuel out the exhaust and the plugs should look black.

 

Both sides, car does smell a little rich. I'm gonna check the plugs tomorrow, I did a couple runs in the dark to check it out after I adjusted to floats. I didn't get a chance to check the plugs after that. The car was loading up a little when stabbed from a dead stop, but only about 1 out of every 10 starts. Motor is about 500 miles from fresh re-build including valve job.

 

I do have an exhaust leak on both sides because who ever built the header kit warped the flanges when welding. I'm gonna replace the flanges when I get a couple bucks, haven't decided if I'm gonna build new ones or just do the flanges.
Will this affect it?

 

Straight flanges can only help. Double check your timing, too while you're at it-couldn't hurt, takes a minute, and might show retarded timing.

-rick

 

Timing checked, intial is 10 advanced. I will check again though.
Thanks, keep throwing me stuff to check and I will, even if I already checked it out.

 

Nuther vote for retarded timing. Had that problem with a Blower motor. Headers glowed red and lots of woofing in the exhaust on shutdown.

 

yet one more vote for retarded timing

 

I would say it's normal My car has lake headers and it has a small flame on hard accel.. It throws some huge ones on decel. You have to remember you're dealing with a very short exhaust.