I just finished this job last week...I took almost 2 months as I was fixing a bunch of cooling system issues, as well (plus was sick for a week)! Anyways, the two rear intake valves closest to the firewall were saved for last as they were a PAIN. I'm 6'-2" and about 225lbs, so was absolute torture on my body trying to get those last 2. I had to lay on top of the engine to get a view of the valve since the cam position sensor cradle obscures the view almost entirely. In the end, I was able to get them done (took about an hour for each of those last two), but no more embarrassing smoke at stoplights or sitting in DC traffic!