Small Block Chevy Electric Water Pump. This listing is for a new high volume electric water pump for Small Block Chevy engines (305, 327, 350, 400). The housing has been machined from billet aluminum and the fit & finish is excellent. This pump is durable and light weight, but is still able to cycle up to 35 gallons of coolant. Electric water pumps reduce impeller drag experienced with mechanical water pumps at high rpms and are recommended for high performance racing applications.Precision machined billet aluminum housing. Eliminates impeller drag found in mechanical water pumps. To prevent any delays with your order you should watch for the following common issues. Addresses that only have a PO Box can cause long delays and almost always result with having to credit/cancel the order in the end. If the ord er requires multiple packages someone will need to sign for each one. Some items are not combined due to size or weight such as crankshafts, torque converters, radiators, cylinder heads, etc. Powered by SixBit's eCommerce Solution.