I just put a 57 b intake and holley 390 cfm on my  55 with a stock 292 and A/T It had A intake with a 4v teapot before/ it sure rans alot better but I have a small stumble when I take off / so far I have check the float level,accelerator pump arm adj,move the pump cam to the #2 postion Im starting to think that maybe I need to replace the pump shooter which is a .25 but Im not sure which way to go. how can I tell if Im too rich or runing to lean? both can cause a stumble or do I need to change my pump cam? Also when my secondary open I feel a kick which I think is a flat spot I think a stiffer spring on the secondary will take care of that problem The cars has 20 lbs vac at idle, I have try runing the timing at 6 and 12 %  with total adv of 38% at 4k also the distributor was update a year ago and it also has a new fuel pump Im hope that someone has has had this same problem and can tell me what fix it

Hey Kansas! Good to hear you are making progress.Usually its a combination of small adjustments to fine tune replacement components like a carb.The PCV valve is just  another example of trial and error.If you are looking to tweek the distributor Mr.Gasket sells a 2 pack of light springs for the 57-74 Ford distributor under part #925D.About $5.00 from most sources.You can use one or both together to change the timing curve of the distributor.The vacuum can on the distr.is also adjustable using an allen key through the opening where the vacuum line goes on.Be cautious and spray with wd-40 a couple of times before adjusting as you can strip the threads by "forcing"  it.Basically you should adjust the can to provide about 8 degrees of advance when vacuum is applied.If you are using the 13L slot in the advance cam you should end up with total  avaialable advance  of 42-44 maximum.Initial+mechanical+vacuum ie:10+26+8=44 total.This is about maximum total you should be aiming for all in by approx 2800 RPM.Playing with the mechanical advance spring tension creates a smooth timing curve.Something else for you to play with if inclined.What source of vacuum are you using for distributor vacuum advance?Fulltime(non-ported) or ported vacuum where the vacuum source does not apply until the carb throttle is opened?Some people find they prefer one over the other as far as how the motor runs.Another topic for discussion.