I wanted to give everyone a break down on what it costs to do a Gen IV cam swap. I only know of 2-3 trucks on this forum that are Gen IV swapped. It is without a doubt more expensive than a Gen III, especially if you have a DOD motor. This is a price breakdown of what I've spent on my 6.2 VVT motor. Some parts are brand new, some are used. I'll include the price of new as well
1) Pat G custom spec'd cam (231/235 .617/.620 113+2) - $320 shipped. I got the cam used, so you'll spend 400$ or so on a new one.
2) Patriot Extreme Springs (.660 lift) w/ Ti retainers - 275$ through SDPC
3) TSP 7.425 pushrods (my cam has a smaller base circle than stock, requiring longer PRs) - $75 shipped on PT.net. They are brand new, unused. Expect to spend $120-$130 on new ones from Comp or Manley
4) VVT Delete kit - $130 shipped from Thunder Racing. This is required if you have a VVT motor
5) SLP Underdrive w/ ARP bolt and belt - $155 shipped. I got the pulley used. It isn't a requirement, I just decided to do it while I had the stock one off. These run for $200 or so new.
6) If you have a DOD motor, you're going to have to get a DOD delete kit. The kit through Thunder Racing (cheapest I've found) is 305$ + shipping. If you don't do this, the DOD lifters will fail and you'll have major problems.
The major thing I wanted to point out here is that you can save a lot of money if you shop around a little. There is nothing wrong with a used part here and there, especially if they were bought and never used. Figure I saved 50$ on the pulled, 75$ on the cam, 50$ on pushrods, and $25 on springs (because SDPC has them way cheap). You can really put some money back if you're careful. I was on a budget and made it happen for around $200 cheaper than it had to be.
If there is interest, I can do a pretty decent write up when I do my cam swap in a few weeks, with pictures.