quad cab automatic

I have been starting to have issues between gears. Seems to be hanging in the gear longer without any added speed. I watch the RPMs go up but no bite until eventually, it decides to shift. It is fine as long as I am gentle on the throttle, but no more jumping out in traffic. I checked the...

I'm going to buy a quad cab SRT but not sure what I should be looking for to make sure I don't get a lemon. It is between a C5 corvette Z06 and the quad cab SRT. I don't have any particular needs I just want to go fast. I don't know if I can make the truck a low 11 high 10 quarter mile vehicle...