Well...just picked up my 4th one. I'm a glutton for punishment or there may be something wrong with me. My 1st one was an 05 quad cab that was as close to perfect for me as I could get. Sold it. Then an 04 RC because I thought I wanted to row gears. I sold that. Then I wasn't sure about rowing gears, so I bought another 06 inferno red RC. Definitely do not want to shift gears at all ever. Sold that one too. Picked up an 05 QC in fair shape. Very glad to be back. It's been run but doesn't appear super molested. Wish me luck! Couple quick questions: 1. I don't ever remember hearing lifter noise at cold start on any of the previous 3. Or maybe it's fuel injectors. But I have some light tapping at cold start. 2. Noticed fans cycling bringing it back in from delivery. Found the radiator about 1 gallon low which concerns me. Pressure test it right? Low coolant could make the fans cycle? 3. I noticed bringing it home that in traffic it will pull up to 230 or so before the thermostat appears to open slowly and then it comes back down to around 200. Worth changing the thermostat preventatively? Or was that a result of low coolant? I know...low coolant is very bad. 4. Previous owner "thinks" it has a mild tune. Theoretically, since there was no device with it - then that tune becomes my "stock" tune correct? That would be swapped with a custom tune from someone else?