2005 chevy ect. cab 4 x 4 with the aluminum block 5.3. 310hp at 5200rpm.
And 335lb-ft at 4000rpm. 6" suspension with 35" tires. 4.10 rear end. I bought a hypertech programmer 3. Any idea on shift points? Or other mods. Prefferabley like to be around 350hp.

 

pick up a good intake and free flowing exhaust. sell your hypertech and get a custom tune. then a cam would be a nice touch.