Drag strip launch problem

HI HAVING PROBLEM AT THE STRIP ONLY ON THE STREET ITS FINE.
My 1970 340 duster 4 speed Hughes cam and springs duration at 50 is only 230 with 545 lift
9.5 compression , Weiand act plus intake. 3.73 rear gears 2.02 casts heads .
This is the problem when i come off the line at 3500rpm the car leaps and than fall on its face were you have to back off the gas and wait 2 sec for it to come back on . i am not sure if it's flooding or not getting fuel in the carb bowel or to much heat under hood as i have no hood scoop . I tryed a new mp fuel pump new 3,8 fuel line were it is rubber also fuel regulator and took off my Thermoquad and put on my Edelbrock 750 afb almost NO change so took off my fbo ign box and coil and reinstalled my stock mp box and coil . This also made no change . That why i was thinking carb . i did set it up with air / fuel meter but at my house. Again run's great on the street were you can spin the tire off the line.