It's pretty hard to fill up the B to max gross. 80lbs is allowed in the baggage but that cubes out pretty quickly (especially with the plugs and canopy shades in there). IIRC about 230lbs ×2 is the limit for naked crew weight (ejection seat limit), and 1200lbs of gas is possible if you really, really bag it out- like stand there when the fueler tops it off to the tabs and say "nope, more."It’s been awhile so I’d have to look but I don’t think it was that far off. I know max weights for the B were 500 lbs more. The weight difference is really just the avionics to include the added UFCP and HUD.
So it's not impossible, but only if you selectively schedule a couple of porkers on a CCX to an anvil sales convention and the taxi out is super short. Otherwise, the max gross weight for the B is just a meaningless number in the book and the annual NATOPS test.
Well, at least until future modifications and/or airframe repair make individual bunos heavier. (I'm pretty sure 039 gained some weight resulting from the repairs after a solo took out a runway sign about six years ago.)