I've decided to go a different direction so I 'm selling off some of the parts I collected in the last couple of months for my build. I've got a complete set of LOW MILEAGE, assembled take-off heads with upgraded (660 lift) springs. These are true LS3 heads that came off a C6 when the guy switch them out for ported TFS heads. They're complete and include all of the rockers. I've also got the intake manifold and fuel rails that came off of the same car. The intake includes all the sensors but does not have injectors. No disappointments with these parts. They're boxed and ready to go. $1500 plus the ride for everything.