Swap A833 for Auto - 71 Duster 340

Edelbrock heads on a 340 with a 4-speed and you can't spin the tires!?..
There's a problem....
Personally I have a 410 Stroker and if I ever thought about putting an automatic in it without question it would be a 904.
Of course I would have a few expensive Parts in it.. of course the slip yoke would have to be changed but the driveline would not have to be shortened as they are the same length as a 4-speed unlike the 727...