To All,
Many have posted take the cab off, leave it on, the face is, if you want to just remove the heads and replace the head gaskets you don't have to remove the cab. If you plan on upgrading the head bolts to head studs, then you have to remove the cab. You cannot install the head studs and install the heads with the cab on. The job of taking the cab off is not hard. I took my truck to Twisted Diesel in Chesapeake, VA and they had my cab off in 1.5 hours. Heads off and to the machine shop in a few hours. The longest part of the job was waiting for the inspection from the machine shop. Both heads were cracked, and had to be replaced. The total job took one week and I was back on the road and good to go. I now have almost 20 miles on my truck since the repair and I have not used a drop of oil or coolant since.