I know it was a 440 center but I think the blokc and the bowl are from the 340 carb. That being said what issues could that cause? Again, I have had no issues with the way it actually runs, if it hadn't been for the surge I would not have started tweaking it at all. Granted it doesn't run like a EFI vehicle but I don't expect it to, most of my cars are carberated so I am well aware of the differences.