Inliners International Forums General Discussion Engines 250ci stumble and backfire????????

Have you checked for any vacum leaks ? also have you check the vacum advance on the dist. Ihave ran a 600 holley on a Offy Stock motor other then headers so I don't think it is a carb CFM issue But also How do your plugs look. Fouled plugs can also give you these types of problems.
hopr this helps }[oooooo]