The fuelab pumps there not cheap at all only ever sold one. The way they have you buy the install makes it a pain were the Fass and Airdog is all in one kit and go.
Profab horn is a nice add on.
The pumps nice but if your not liking the price to go with the airhorn. Those pumps get high once the pumps added then the install kits added the way they sell them. Most save and go with a Airdog or Fass.
100 fuelab Velocity...
Specs on all those parts in the links I gave not bad to have spring pressure checked while there apart and reinstalling. They will check guides also while there in them that's there job. Your head gasket kit has valve seals in it so they can install new ones.
Here is the specs on the heads
http://www.duramaxdiesels.com/forum/showthread.php?t=6135
http://www.duramaxdiesels.com/forum/showthread.php?t=6162
Most that you would want them to have to take off. And it's nice if they set the valves back in the same amount they take off.
Surface...
Welcome to the forum have fun.also you might like this area to read around with your up coming work.
http://www.duramaxdiesels.com/forum/forumdisplay.php?f=97
Have the heads checked and valve job done. No on the tq plate honing at that point you would be into a full overhaul. Pistons need to come out and you would be replacing torque to yield bolts and bearings.
Rods,brearings and gasket kit
http://creaturesofthenightperformance.com/Engine-Performance-Package-2-Carrillo-RodsMaster-Headgasket-Set-H-Series-Bearings-FREE-HOODIE-P3579197.aspx
Or
Rods, bearings, pistons and gaskets kit...