1 have a 400-450 horse 350 engine with a 700r4 trans. my problem is every time i put the car in gear it bucks shakes and stalls out. i was told the problem was the stall is too low. is this true? and if it is what do i need to fix the issue and after that can i lower my idle down to 750-800 rpm and be able to drive the car. now i have to double foot the car or put in neutral to drive the car any help would be appreciated thanks

 

Almost sounds like the torque convertor clutch is applied full time.You should be able to disconnect the wiring to determine if that's the case. Just a thought.