6.0 truck motor/auto trans/ecm and wiring

the 6.0 is a badass motor, i'd use one if i had the option. borrowed a 2001 1500 hd crew cab with a 6.0 and pulled the trans-am home from carlisle 2 yrs ago, the truck was quick even with the loaded flatbed trailer.

 

6.0 and 5.3 blocks are all cast iron. the 5.7 from the camaro, firebird, corvette are the only aluminum blocks, although the external dimensions are the same for all the lsx engines. supposedly, the 5.3 intake is almost as good as the ls6. if you want to buid it from scratch and go big, i'd say do the 6.0 block, but use the ported f-body or aftermarket heads, computer, etc.

 

What exactly is the benefit, or should I say "Difference" between a
6.0L Vortec and
5.7L LS1 from say a GTO ?

I see the 6.0 has 345HP and 380Ft/lbs
I see the LS1 has 350HP and 365Ft/lbs

I can't see the powerband being the same in a car vs truck motor.
So what .....is it just an aluminum block VS Cast iron block ??

 

I would think that the cam and the tuning are the difference, but the intake and exhaust might make a difference as well.
The 3/4 ton trucks get the 300/360 6.0 while the "Vortec Max" and SS get the 345/380 version.
The iron block weighs about 100 lbs more, but is stronger and more stable at higher power levels.
Of course the extra cubes always help, but if you get a 5.7 for a good price I wouldn't worry about it.

Justin, I think you are wrong, the 6.0 is the only iron block. The 4.8, 5.3 and 5.7 are aluminum blocks.

 

Here's an article I just found while I was searching for LS1 2nd gen retrofits, that I thought you might like to read.

http://www.ls1tech.com/forums/archive/index.php/t-406391.html

 

The truck motors are iron block aluminum head. The 5.7 ls1 are aluminum though. I believe they have made some aluminum 6.0 and 5.3 for high output versions and for cramming the 5.3 into front wheel drive cars. But I know for a fact that the 5.3 in my truck and 4.8 in my buddies are iron block engines.

 

Not all 5.3s are Iron lately some have been showing up alum at our dealship. Weight concerns?