I am gonna do some kind of motor swap in the truck and I can't decide which one to do.

Choices:

1: 6.0L long block $1600. Mill and port the heads $900. Pros: It's cheap good power but wont handle much juice.

2: LS1 5.7L $1500-$2000? Mill and port heads $900. Pros: Great power and I can use LS6 intake. Cons: Wont handle much juice, not all parts from my truck will bolt directly on (more fab work).

3: Built 6.0L $2000-$2500. Stick my GTP S2 heads and Piglet cam in it. Pros: Best power handle lots of juice. Con: It's more expensive and I can't recoupe money from the sale of GTP heads.

Or I can just TRY and sell my GTP heads and that gives me $2000 to use towards any of these options. I just hate to give em up because they are such awesome heads.

 

I like option 3! the GTP's are nice heads!

 

Is an LS6 a direct swap??? I have an ls1 going in in the near future. Any more power to be had from it?

 

Vote for choice #1. Cheap and can handle a good amount of power, when done correctly. Nitrous is as safe as you make it. The 6.0 heads are better than LS1s by a long shot. More cubic inches is always a plus.
I have had both and would choice a 6.0 over a 5.7 anyday.

 

True! can I change my vote

 

No real power advantage to the LS6. The LS6 and 6.0L heads are essentially the same and the 6.0L motor has bigger cubes and is MUCH cheaper.

Yeah. option #1 sounds good but I am worried about the condition of the motor and such since you never know exactly what you are gonna get. I just talked to my mechanic and he said he could build up a 6.0L short block fairly cheap like in option #3 but I'll just use the stock 6.0L heads till I can get em worked. I can sell my GTP stuff for a pretty penny and recoup 3/4 of the cost of the short block NP. This way i can get forged pistons and bump the compression to 11.0:1 or 10.5:1 or whatever and still be safe to run a 200shot when my fuel system is ready

 

What kind of "fab" work are you talking about? I just had a 5.7 LS1 put in my truck and there was no fab work required.

I went with the LS1 over the 6.0 mainly because of weight. Weight is our biggest enemy, and I can't see 0.3 of a liter making that huge of a HP difference.

My suggestion? Get an LS1!

 

I thought there were differences in the wiring harness which required splicing and maybe the fuel system because LS1 don't have a fuel pressure regulator but we do. That kind of stuff. I guess I was mistaken. Hehehe

 

Well, all you have to do is use your truck intake/accessories. That's what I did! With the stock 4.8 tune, an open rear-end, cast iron manifolds and a slipping tranny, I pulled 101mph in the 1/4! I rebuilt the motor with some safety (read: ARP) stuff and put a TR224 cam in it. So, I have some basic truck bolt ons, and a cammed LS1 that should be good for mid-low 13's on some tires.

 

can you put on a radix on the ls1. I am guessing so since you replace the intake when you put it on. Also how much less does the ls1 weigh compare 5.3 and 6.0.