Here is something from this website, with real life facts. Look at the fastest car list. The six second zone is 2 Hemis a small block and a big block. The seven second zone is dominated by big blocks and Hemis, with one small block. The eight second zone is where it starts to get more interesting. The first two entries @ 8.02 one twin turbo big block and a nitrous small block, then it seems to go back and forth between big and small blocks. Depending on power adders, cubic dollars, and vehicles. Maybe a matter of personal preference.