So I just purchased a 2020 2.7. It replaces a 19 LD Custom with a 5.3. I have owned the new LS based LV3 4.3 as well. Power wise, it feels like the 5.3, and it has better fuel mileage than the 4.3. Instead of looking to increase power, I have used what the truck gives me to make the most of the power there. If you want to go faster, to put more power to the ground. Start by putting it in AWD if equipped, shut the traction control off, and put it in Tow/haul mode, or sport mode if equipped. I ran a 15.6 sec 1/4 in a 4.3 powered 2014 silverado 2wd, and a 14.6 in a 5.3 awd configuration. I read the 2.7 can move the new silverado to a 15.1 sec 1/4. It is not Camaro performance, but it is still good.