A 3500 stall in a low comp. with that cam small block will brake stall around 3000 I would never go lower then a 3000. If you use a 2500 you car will be a pig from a stop. Brake stall is not where the cars transmission grabs and pulls out. I use a 5500 on the street it idled somewhat free and pulled out as soon as I touched the throttle. Stomp the throttle down and its explosive. Converter is the most important choice for a good running performance automatic car. I never used anything lower then a 3500. All my original 340 cars in the past brake stalled at 2800 from the factory unless the trans was replaced
I bought a 70 340 swinger in 1971. Auto on column flashed stalled and left at 2800 shifted a 6000 when left in drive. Due to a light weight governor they had same as Hemi or max wedge that is what they came with. Also add a part throttle kickdown if you leave it full automatic. Three things that make them fun when left in drive
1. Proper converter
2. Light weight governor
3, Part throttle kick down
If you shift a auto trans not turned into reverse manual. Never take off in low take off in drive and pull it to low after the car is moving. Big difference you'll even feel it on the shift.
