490 Lift Valve Springs for Small Block Chevy. Small Block Chevy Performance Valve Spring with a 1.264 O.490 lift with an installed height of 1.70. For use on 283,305,327,350, and 400 cid Small Block Chevy. Valve Springs represent the most commonly overlooked item when rebuilding your engine or replacing your camshaft. A new cam offers limited performance improvement if you have weak springs. It is always a good idea to check your springs or replace with the recommended aftermarket spring. This Part Fits The Following Vehicles. Make sure all of your auctions have ended prior to checking out. Northern Auto Parts ships all domestic orders via UPS. Attention Australian Customers : We will automatically upgrade any packages over 15 pounds to UPS Expedited to Australia. This will give you better tracking and get you your package faster. Again, we will not charge you any extra for UPS Expediated to Australia on packages 15 pounds or greater. We get great rates from UPS to Australia, and we are happy to pass them on to our customers. The item "SBC 327 350 Performance Valve Springs to. 490 lift Z-28 Set of 16" is in sale since Monday, December 3, 2018. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Valves & Parts". The seller is "northernautoparts" and is located in Sioux City, Iowa. This item can be shipped to North, South, or Latin America, all countries in Europe, all countries in continental Asia, Australia.