I would love to get a renew kit for this carb but i can't find a match online. It is a Holley Marine 4 barrel double pumper, mechanical secondaries and electric choke. I know it's dirty but it hasn't been used that much, plus it was modified by the engine builder back in the time period. To me it is worth finding a renew kit. Any ideas? To clarify, what looks like a 6 is an 8. Its 4780-2.