77 cordoba 360/904 swap into 72 duster 225/904 car?

Have a line on a full 77 cordoba full drivetrain with 43k miles. Wondering if theres any downside to this year 360 and 904 combo. I know its considered a b-body. But the price is right. Im sure I can swap to some better heads but curious if the swap would require a new driveshaft length?