I was wondering if any of you have used the Novak block hugger headers for a TJ Gen lll swap? If so, have they been reliable, leak free and have you been generally happy with them after putting some miles and years on them? So that's the primary question but to expand a bit if you care to read on; I have a 2004 TJ Rubicon, 4.0L, Auto. It's basically stock for now except for 1.25" BL. I've got a Gen lll 6.0L (LQ9) and 4L65E from a 2004 Escalade that I'm preparing to swap in. The LQ9 got a stock rebuild. Right or wrong I've bought the Novak weld in engine mounts and their t-case adapter. I don't believe shorty tube headers will offer any significant performance gains, I'm really just looking for something to fit well and be durable/reliable. I would actually prefer OE style cast manifolds with heat shields and ideally I would like to be able to modify the Escalade down pipes (w/ converters) and get them to fit. That might be a tall order. The Hooker cast manifolds look very much like the OE truck manifolds with different outlet positioning and without heat shields. The only reason I'm considering the Novak headers is because they're meant to work for the swap at hand so I can feel fairly confident they will fit and work. I know there will be snags along the way but I'm trying my hardest to get all the RIGHT parts here to at least make it run and drive before I even touch my Jeep. I have seen random forum posts saying different OE manifolds will work but then seeing others saying they won't, which doesn't inspire confidence. I have also seen in LS forums people saying that stock LS manifolds weld well and they have successfully cut, modified and welded them to reposition the outlet. Maybe this is an option with the Escalade manifolds but though I have a welder, I certainly am not a welder. Any thoughts, advise, experience about the primary question or my other thoughts would be greatly appreciated! Lastly, sorry, I know I'm long winded but thanks if you made it this far.