Carter BBD Question?

I am rebuilding a Carter 1 1/4" BBD to go on my 1970 Fury III convertible with a 318. It is a #4608s from a '69 Fury.I have the proper #346C SMP kit for it.The inlet check ball for the accelerator pump has a retainer on it that is not shown in any literature, factory or otherwise. How do I remove this retainer cage to replace the ball without damaging the carb and is it even necessary? Or should I just leave it alone and not replace the ball at all?

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