The way I figure it, you only need to build half the horsepower - I am a believer in smallblocks simply because of front heavyness. If you really want to find out what something similar to a huge horse T bucket that search for Wally Boortz' Winged Express or look on youtube for Nanook videos.
I think the winged express had about 2000 hp, ran 6 something in the quarter in the late 60s, but it had wings on the roof, and was a hazard at that. There is one Nanook video on there where it totally comes off the ground...
Would you want to try to stop a T Bucket that ran 9s ? I think so many T buckets are just for showing and cruisin so its hard to know some of these cars actually would run. I have entered all the weight into a quartermile similulation program, and its pretty wild to figure out. I know I have only a 302 with a cam and an intake, and I could give most muscle cars a pretty good run, gave some Mopars headaches, but got awfully windy at higher speeds.