that head gasket job is a bear!!! I feel for you, I just did mine not too long ago.
while you've got all that crap off go on and replace all the stuff you can! new water pump is good. A new timing set will make your truck run like new again! Mine's got 200k on the odometer, replaced the timing set and it's literally like a brand new engine.
stay with it, you'll get it done, but seems like there's no end to all the junk they put on top of that motor.
also, make sure you have the heads checked at a machine shop, I was in a hurry and almost didn't do it, but someone talked me into it and turned out one head was cracked all the way down the whole head.
When I did mine i used a combination of an open end wrench and ratchet. Im not sure how the body lift affects it though, and definetly have both heads checked out. I would bet that you have at least 1 cracked head.
you should always, always take your heads to a machinist if you have a blown gasket(I take them in anytime i take them off for whatever reason)... most of the time its because of head warpage, where they will plane the head, and ****aflux, using a magnetic powder to find possible cracks... unless of course youre a sadist and like doin the job all over again...