Pros of front crossmember swap?

[Captainfab]

It all depends what you want in the end. As said above you can make the swap in a few hours (with engine removed) as long as you don't mind driving it at stock height and with stock parts. Then you can replace worn parts when you have time. But if you are one that has to have everything new and or want dropped spindles and springs, then just tear apart your original suspension down to the crossmember and start rebuilding from there. Of course you can also rebuild the entire '73-'87 suspension at your leisure and then swap the complete assembly in a weekend.