Truck Repair: N14 Headgasket, n14 cummins, head bolts

Question
My KW has an N14 Cummins. I was told the middle gasket is blowed. KW wants $2,750.00 to repair this. They said the front or back head would have to come off, also. I've got all kinds of tools. Can I do this?  THANKS  LEE

Answer
Well you need a large torque wrench for head bolts & 3/4 drive air gun would be nice for turning the head bolts the additional 90 degress after torquing.The triple head gasket set is cheaper than 2 single head sets so I would pull them all off at one time.You will have to remove the frt rocker housing anyway to get to head bolts hid under it for center head.