"Converter change" how much improvement...

I don't doubt yours is real torquey with that cam and those heads. Mine has a bigger cam (Lunati 234/242 @.050) and less efficient chambers (X heads) so it's probably not as torquey as yours but it sure does come on good at 3k. You might try more air in the tires just to see what happens. Mine hooks best at 30 lbs. With 20 they spin some. I know with slicks you don't run much air but from my limited experience with drag radials it seems they require closer to 30 to work the best. My car is kinda heavy (3620 with me and a 1/2 tank of gas) so maybe that's why it takes more air in the tires to make them lay flat. With 20 lbs., from the prints it leaves it looks like they cup up in the middle.

Ok i'll try more air, i can see why your car needed more stall, i hope mine reacts as good as yours did, i don't know what mine weighs, i'm guessing around 31xx without me & i don't weigh much.

How is your rear suspention set up? whats springs/shocks are you useing?