Those 6.4s are fast with just a programmer.

Yes, yes they are! Aholt, you're an upstate NY guy right? Hittin the dyno on the 13th of Aug this year?

well ive been hunting and found as few real nice 6.4s problem is the pirce range isnt where i wana be right now, so im im more then likely getting into a 6.0 for now and wating about a year to year n half to get in to a 2011 6.7, now as for the 6.os i kno they have problems with the headbolts streaching, and the egr taking a crap, what does it take to do headstuds on a 6.0 besides the obvious, can i do it in my driveway? i kno the egr cooler is a project and a half.....

Yes you can. It's all a project and a half, but it's not "difficult" just extremely tedious. You can do it cab on, it has been done before. Much easier to take the cab off though. Quite a few threads about this going on in the 6.0 section currently...