B2 a4ld to fm145 drive shaft Q

[albertabronco]

so i have a 87 b2 with a4ld im running a one piece rear shaft im swapping in a fm145 from my donor b2 i understand the front drive shaft will be fine but the rear can i still use my one peice or do i have to use the one out of the donor. also for the front can i use the one im runing currently with the a4ld or will i have to use the one out of the fm145 truck. oh and my good truck the one im swappin the fm145 into has a 4" lift so the 2 peice shaft would prob not work so good im thinkin?? also if i can use a one peice what lenght should it be and what kinda truck should it come out of

 

[2manyfords]

The FM145 is roughly 2" shorter than an A4LD so you will need both donor vehicle driveshafts.