i had my vp v6 exec auto with extractors, 2.5 inch exhaust, powerchip and shift kit pull a mid 7 second pass (with no extra weight and next to no fuel in the tank)
It all comes down to the condition of the transmission in an auto, it affects takeoff speed/response, gear change & overall pickup through each gear. If you have a healthy motor with minimal restriction on the auto/diff you can see those times with a bit of mild tweaking.