Which will get to the end of 1/4 the quickest

I may be wrong here but, I would think with that 440 would get that Demon to about 10.90's? Something just seems off power wise.
The exhaust seems to be a bottle neck, and with 4.10's and 325x50x15 tires what kind of RPMs are you running through the traps. What's that 590 lift cam pull to?
Also have you tried some different intakes?