Plain and simple for best hp by not tearing all the way down vette ls6 motor or 6.0.

 

wow that's a good question. I persoanlly wsould go with the ls6 but they suaully cost quiet a bit more. You will save around 90lbs off the front. But for the $$ usually the 6.0 is the better way to go. youcan swap in a cam and springs while the engine is out and You will be producing a really nice healthy number.

 

I went with an aluminum motor to save weight. Between those two, I would pick an LS6 over any 6.0, unless you're planning on running any serious amounts of boost later on down the road.

 

thanks but how much boost is too much.

 

ls6 for sure

 

You can get away with 10-12 Psi on a stock 6.0l for a while with a good tune and running it richer than normal for safety
The Ls6 Aluminum block has higher compression too and you should be able to live with 8-9 psi just because of the added compression

I went Iron and am running 15psi on Pump gas with a turbo

 

If i changed the heads would it lower the compression if so where could i buy some?