On some engines, you may not even notice the difference between a 2500 and a 3000 stall. I drive mine everyday with this 3000 stall. After you drive a car with no stall, then add a 3000 stall, it seems like you are stretching a rubber band. Really revving to get it up and going. But you get used to it really quick.
Stall will just play a part, depending on what is your motor and rearend combo. if the cam is too small, sometimes a stall isn't even needed. I've heard anything under 230@.050 doesn't really need a stall. And need deeper gears for larger stalls to keep from slipping all the time in town.
Hope this helps!
383 Speed-O-Motive stroker kit with Holley 750DP, RPM intake,MSD6a box,World Products Sportsman II heads, ported and polished with 2.02/1.60 valves,64cc,TRW forged pistons with 10.7:1 compression, Comp Xtreme 284 cam,Crane pushrods, Comp Cam 1.6 full roller rockers,ATI damper, 40 series Flowmasters, 4.11 gears with TH350 and Hughes 3000 stall.