Re: cv driveshaft
I dont think it would be an issue as to the length.
When you do the SYE you will have to run a shaft with the slip built into it.
I would think this would make up for any minor lenght issues.
The other consideration will be the U-joint at the diferential, make sure to get your 44 set up to run the same as you have now.
Would also be a good time to set your pinion angle on the new 44 that is.
Worse comes to worse you can have youur new shaft modified...
Good luck, Don.