Ok so I have a parts list together and I'm already putting it into effect, this is going into a 6.0 lq4 yukon Denali awd, weight is 5620#, modification list is
Fast LSXRT intake manifold
Fast fuel rails
90 or bigger throttle body
232/232 112 .595/.595 cam
Longtubes no cats full 3" dual exhaust with X pipe
4:10 gears
3000 stall converter
Built 4l65e
20x10 wheels
Lower it down 1/3
only details I'm missing is who's going to tune it and if I will need larger injectors. What do you guys think about this projected plan? I would also like to add a set of heads to the mix bit I'm not set on any set yet.

 

From everything I've read on here and other forums, skip the fast intake, too many problems. Save the cash and get a tbss intake. Tune look on the right side of the page, a few very good options, Nelson, Wheatley, Black Bear

 

Depending on what you decide for cylinder heads, I would use that information combined with your known weight, engine characteristics and final usage of the vehicle to make the decision on the camshaft. Beings you have an LQ4 with its correspondingly lower compression, I would either at least go with some 243/799 heads and a slightly smaller cam, such as a 228/232 .588/.595 112 or if you did go with a set of heads that had an improved intake/exhaust flow ratio, the cam you already had your mind set on. I like a cam with an even split, but to get the max from one, you need the rest of the induction / exhaust system to play well with one another. The engine will really respond to raising the compression to 10.5:1 to 11.0:1 by becoming a lot crisper with the larger camshaft you’re looking at running. You mentioned Long Tube Headers, but for the amount of air you’re planning on moving, I would say you would be best served by going with at least a set of 1.7/8” primary tube models. I also believe your going to need a little more torque converter than what your currently planning on, most likely something in the 3600-3800 range. Beings your Denali is a little older and not a flex fuel vehicle, I would plan on at least a set of the 8.1L Marine injectors to keep from modifying your harness or any set of 42lb or so injectors if you don’t mind cutting and splicing your harness and a little better fuel pump in the tank to keep the beast fed.

You didn’t mention what tire size your planning on running, but I would somewhat reserve the final gear ratio selection until you have that figured out. You may find that if your tire selection is what I would consider being on the tall side, that you may be better served by going with a little more gear being naturally aspirated with such a heavy vehicle.

Just my feelings and I’m sure you and others may have a little different outlook.
Whatever the case, build it and most importantly have fun and enjoy it!

 

Too big of a cam for that converter and weight. Go up by 600-800 on the stall speed or down about 10* on the cam.

 

Well I already have the LSXRT and the cam I picked them up for a smokin deal, along with some nice fast fuel rails, is a 36-3800 stall converter going to be daily driver friendly?

 

Like said, I would def consider a little bit smaller cam, possibly on a split duration..

 

How big are you talking?

 

Well in a 5600 truck with only a 3k verter I would be looking in the low-mid 220 range on a split..

 

I have the 232 cam already I do not have a converter I have options for a converter I just want it to be street friendly since this is a daily driven truck... I dont know how street friedly a 3600 or 3800 converter is.

 

That cam in that big truck is going to want atleast that much converter..