2500 stall that stalls @ 1800 crappy

[Jeff Chambers]

Not only does the engine torque/power affect the stall, but stall is also affected by how you're measuring it. If you're simply brake-torquing it, you won't even be close. The best way to determine 'true' stall is to bring the car up on the transbrake. At this point, the transmission is essentially locked (acting as a true engine brake) and the true converter stall will be revealed by the peak engine RPM at WOT. To see how much 'flash' is obtained when you're coming off the transbrake, you really need both engine and driveshaft RPM (like from an Autometer Ultimate Tach) so that you can discern engine rotation versus driveline rotation.

Don't blame B&M. They advertise a particular stall speed based on a baseline engine performance (TQ & HP). Now if you sent them your engine dyno curves and the stall speed was off by 1000rpm, then I'd say you've got something to complain about.