I am doin a low mile motor swap and before I put the new motor in I was gonna do the aftermarket headgasket but not sure exactly what goes into it on this motor. Attached is a pic of the valves/heads is it the gasket that goes directly on the bottom of thease heads? If so it does not seem that hard to do? As far as the timing can you mark the position of the cams so you dont have to re set it? I imagine you take the exhaust manifold off and the intake but what elce do you unbolt for this unit to come off? Last but not least where is the cheapest place to buy the aftermarket steel gasket and the APR studs?? Anything I elce I need to know before replacing? THX!! - Eric