Another 4spd On a 360 question..

The driveshaft length depends on which A833 it is. I know that for an e body A833 the driveshaft length it the same as for the e-body 727. But what I don't know is if the 727's had a shorter A-body version like the A833 does...

If it's a 4 speed from an A, the 727 driveshaft will be too short.

I'm guessing that you need a 48.75-49" driveshaft. the one you currently have is about 45" if my memory serves me right.