how to attack my front end swap?

[69gmcc10]

I need some help with deciding how to attack swapping the drum front end on my 69 to the 72 front end on the parts truck I have.

What are the pros and cons of moving the entire 72 crossmember to the 69 chassis vs transferring the pitman arm, idler arm, steering linkage, changing out the ball joints to take the later spindle and installing the 72 spindles on the 69 arms?

Thanks in advance