Well when I first joined I was going turbo on my 4.8. I decided to change and do a 6.0 l92. I'm taking my heads to the porter today to get the porting done. Heres what I have so far. I purchased a new set of l92 heads (823), 2009 6.0 silverado long block with all accessories including ecu, holley hi ram l92 intake, comp cams .604-.617 lift, 224-233 duration on 113 center line. Hedmann hustler gbody swap ceramic coated long tubes, TEA .660 lift vavle spring kit from Total Engine Airflow, Wabro in tank pump,Ati 3000 stall converter for my 4l60e. I'm hoping the intake will fit under the hood, thats my main concern. I may have to trim the hood brace on the cowl hood. If it was a 4" cowl I wouldn't have to worry about it. My goal is to run 11.50's on motor and 10.50's on spray, yes we are going to spray at least 150, not this year but have that set up over the winter and spray it in the spring. I think it should make 430 to 450 at the wheels. We should start the re-swap from the 4.8 to the 6.0 in a couple weeks when I get the heads back from the porter