Has anyone used any of the LS/VTEC kits off of Ebay? There is a wide range of price differences and components ranging from just the oil line kit, on up to the dowels and line, kit and head gasket. Whats the best way to go? How much would a machine shop charge to do the modification to the head needed for the swap compared to buying a kit and doing it yourself? I'm in the process of collecting all the parts I need for the build and this is one of the last things I need to figure out...