I have been informed by my service technician that I do in fact have the tick. He has seen it in several other Cobras and says that mine is rather mild compared to others and that it will very likely not hurt anything. He has left it up to me to decide if I want the Jan 05 revised head or not. My warranty is still good, but I have several issues with the new head install, the first being that I don't want my engine torn down by complete strangers. My second issue is that I don't want a Jan 05 head on one side and the old head design on the other, it just bothers me. Is there any issue with having two different heads on the car? I am also having the service manager give me an estimate on what it would cost to have the passenger side head replaced while they are in there. Can anyone give me an idea on what this should cost? Should I just take the free head install and run?