Was planning on pulling the 460 out of my boat for a checkup and a couple upgrades over the next couple months. I have a 6.0 Lq9 i got stuck with from a customer gone a-wall a while back. I think im gonna stuff it in there and see how it acts. I checked out those cassell headers they offer, but it dosen't look like they come with the jacketed risers? Does anybody know if they have them? Planning on keeping the motor stock for now, running the factory injection open loop with no 02's. It will be a no brainer to tune that way, the motor is stock and should run well with the factory open loop cold start tune thats already in the computer. I think it will anyways, but well see. Does anybody have any experience with the cassell LS exhaust manifolds? It looks like they have a adapter for the Crank flange to my current Ujoint assembly also, so that gets me off the hook for making that up also. Im sure it wont be a rocketship, but its gotta be faster than my hardin 460, and better on gas and super reliable.