Re: What do I need for ls6 upgrades from ls1.
I used to run a Lingenfelter GT2-3. It was 207/220 .571/.578 118.5 LSA. I ran it with some cheap ported heads and my 02 Firehawk made 390 to the wheels on the stock tune. You need some good valvesprings for that lift, but it was a nice setup that drove like stock. If you don't mind getting a tune, I would go for a 224/224 .581/.581 114+4. You can similar cams from a bunch of different vendors. I would get a tune for running that cam, mostly just to fix the idle and driving characteristics.
Also, you will be kicking yourself if you don't go at least 3600 on a stall.
11 Silverado - No times yet.
99Z28 - email@example.com. 403 L76/L92 with street tires and launching with the traction control.