Final troubleshooting for Ford 460 motorhome, advise?

I have a Class C with a '84 Ford e350 XL chassis, 460ci engine. Holley Carb, LIST-50005-1. At one point she would stumble from a standing start. The problem was caused by a faulty (leaking) accelerator pump on the carb. This little pump squirts more fuel into the carb when the accelerator pedal is pressed (standing start). I replaced the pump diaphragm (required removing the carb from the intake manifold), and this fixed the leak and standing-start stumble. I have pictures I can share if that'll help.