sorry didn't mean to put e in it lol typo but I seen hotrod magazine put 706 heads on a 6.0 to get higher compression but maybe some head work. Cam/springs, header, hi flow oil pump, trailblazer ss intake and a tune should get me in the 400hp range you think?

 

You can get a drop-in cam that has lower lift that uses stock springs. You don't need a high flow oil pump. The OEM one is fine.
Keep in mind the LS2 put out almost 400 HP with a 204/211 cam with .524 lift. A tiny bit more cam will do 400 easy

 

Now I got my eye on a 2004 lq4 6.0 nowthe first motor fell threw. Didn't the 04 have 2 dif style head bolts and special style pistons?

 

Unless you're going to totally tear the engine down (I don't know why you would...), the head bolt style nor the pistons are worth worrying about. All are dependable designs.

 

Ok cool so another question was the 04 and below have the pressed in piston pins and the 05 on up had floating piston pins???

 

Roughly, yes.

 

So can I install full floating piston pins in a ls motor that come with pressed in pins factory? Can I use the same rods?l if I can can I convert them

 

The rod dictates the pin choice. If you want floating pins, you’ll need gen4 rods. You can put gen4 rods on a gen3 crank, no problem. Of course with floating pins, you’ll want to make sure whatever piston your using will accept a wristpin retainer clip…it must have the groove machined in it. Most pistons do have it, but you might find an odd Gen3 engine with pistons that don’t have the groove in them. Gen4 rods are a way better choice for strength, so I’d plan on finding a Gen4 engine if I were doing what your doing.

 

Ah ok understood thanks, I can't seem to find a gen 4 in my area only gen 3s

 

Where are you located?

 

Hour south of atlanta

 

Im an hour north of Atl. I can find plenty of Gen4’s but you’d have to drive an hour or so. Well worth it to go Gen4 in my opinion.

 

che70velle, Where do you find these motors? I'm 30min north of Atlanta and have been looking for a good 6.0/6.2 motor that doesn't cost millions.

 

yea now I'm currently looking outside my area to find a gen 4

 

seem like the city guys in the A want big money and trying to get rich off the 6.0s

 

The gen 3 is plenty fine for your application. I know i am in the minority but i prefer the gen 3 and for me they are easier to tune.

 

Ok cool that's what I like to hear about the gen 3.... so what makes the gen 3 so better to tune for you??

 

The actual engine only matters if you need the stronger parts in the gen 4, which you don't at the power levels you are asking about. The computers are a different story. The gen 3 computers have a much wider knowledge base simply because of how many years people have been tuning them. They also have freeware tuning options to do almost anything you could want without buying HPT or EFIlive if you are on a budget. Be aware that freeware DOES mean a steeper learning curve than commercially supported software, but it is very capable.

 

Ok I see where you coming from makes sense, I guess I'll stick to a gen 3 6.0 lq4 as my first ls motor so I can learn the in and outs of things

 

As long as it looks like you are trying to do some legit research, as opposed to just asking for spoon-fed knowledge, the people on this forum will always be helpful. Just remember to look at post dates while you are searching topics. People are constantly asking questions in decade old threads that they stumbled across while searching.