I got 3 of the 4 right side ones out with just my hands.
The #1 exhaust was a real pain, but I think it will still work.
The whole time I couldn't help wondering if someone doesn't make a tool for the job. I took a break a few times to google random stuff and found no pushrod tube removal tool, and shortly before finally getting the the #1 exhaust one out I had a vision of spark plug wire pliers, wished I had some and couldn't help wondering if anyone has ever tried using them and if they worked?
Something like these http://www.matcotools.com/catalog/product/SP824/spark-plug-wire-puller/
Just use water pump pliers And pry agents the case
http://www.shoptalkforums.com/viewtopic.php?f=1&t=131414
DWP