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I read up on here that the ls1 put up better numbers matched with a cam. That's why I was looking at this. I originally was gonna go ls6. Can anybody confirm for sure?
Ls1 is fine. Look at the flow numbers and the tpis dyno numbers I posted in the sticky, and decide for yourself. Keep in mind that you have a 5.3 and not a 5.7 when choosing.
I believe that what the people here are trying to say is this; Yes, this manifold should work for the swap. You will just need to use a freeze plug to fill in the EGR hole.