I have been reading around on here and running searches since November trying to figure out what cam and stall I want to swap into my 09 5.3 Crew Cab 2wd ZQ8 Colorado. This is my weekend "toy" the biggest thing I have ever towed is my Matco toolbox. So I'm not too worried about how great it pulls a trailer or any of that. I just want the most power/torque and aggressive idle I can get out of a cam and stall while being streetable. I really like the sounds and acceleration of a tsp 228r with a 3200 stall I saw in a 2011 silverado on youtube if that helps at all.