okcuz most guys dont kowwhat they are sayin...if ya have a stock 5.0 ya power rpm range is lets say 1000-5200 hypotheticle... and ya buy a 3000 stall you lose 2000 rpms of ya power band..ya u will smoke the tires,but will loose power... by not using it..how ever a smaller stall will use the power band more efficient..now if ya have a cam with 2500-6500 then a 3000 is way to go.. rule of thumb..says 500 rpms above were ya cam starts makin power..thats why dynos come in handy you find out ya peak torq #s and peak hp#s and can pick right stall...so those that say 3000 regardless of what ya have ,they have no clue...ask a reputable company///

 

Actually the rule of thumb is about 300 rpm below torque peak. Stall is a function of torque, in other words the more torque an engine makes the higher a givin converter will stall. A 3000 rpm stall might only really stall at 2500 in his particular car. I guess that my 4000 ropm stall and my shifts at 6600 mean that I only have 2600 usable rpm and my setup was not well thought out.... I do agree that calling a company is a good idea.