I'm trying to break in my .040 396. I idled the rpms up to 2000 for a 20 minute cam breakin. Well about 2 minutes into the break in, I noticed the passenger side primary header tubes cherry red. I first thought I must be running lean, but I noticed the driver side was normal, and the garage smelled alittle rich. I have a Edelbrock 750 manual choke, and Edelbrock intake, both which are new. A friend of mine mentioned to me that there may be some trash in the carb to cause the left bank to run lean. Do you guys have any suggestions? Or have any of you heard of these things happening? Some have told me to go ahead and finish breaking the cam in that this sort of thing is normal. In fact one guy talked to a ford mechanic and he said that red was good. ?????????