I have a PJ 27+5 with dual tandem 12k axels and monster ramps. For what I use it for its perfect. Sometimes I wouldn't mind some extra space but for the most part it's perfect, I can get into most places easily with that trailer and my ccsb.
I am going to replace the heads on my truck in the next couple of weeks. I think I am going to go oem. The factory heads have 235k on them so hopefully this next set will last as long. Lol
I'm in the same boat as you with my 6.0. I have fuel in my oil also, I'm thinking my injector bodies have cracked too. My injectors are from holders, I need to send them back I just don't have time to pull them right now.
How heavy will you be towing? My dads 6.7 has an elite turbo kit with their 64.7 Vgt with gear head tuning and with loads 20-25k the turbo gets a little laggy. It's not too bad but anything bigger wouldn't be fun to tow with Imo. Everyone has a different opinion on what is fine for towing so you...
I love my holders injectors. They are only 190/75 but they idle smooth and start up is perfect every time. I ran two different sets of warren injectors and had bad luck with both of them.