driveshaft

i have a 1972 duster big block has a 727 went to the track twisted the tail shaft right off get trans rebuilt i noticed that the drive shaft is not flush with the tail shaft id say a good 3 inches away dose the shaft need to be flush with the tail shaft because i did a burn out and never got out of the water box broken u joints cracked tail shaft my car is pushing over 600 hp do i need a custom built shaft to solve my problems from rear end to tail shaft please let me know guys i dont want to spend another 850.00 in tranny work much help please