I just finished installing a 440 in 74 cuda with a A833 trans. The car was originally a 318 car with a 904 trans with small yolk, 8 3/4 rear with 276 gears. I thought that the drive shaft would fit,boy was that a mistake.The drive shaft is too long. I looked at my sons 73 with a 340 727 trans and a larger yolk , it looks like 8 3/4 323 gears and the drive shaft is shorter. I did look up on the computer and it looks as if the 73s drive shaft would fit.But I also saw another drive shaft for the 440 set up from the factory. What is the proper driveshaft length and size?? And does anyone know where I can find an original driveshaft?? Thanks