I just swapped in my Dana 60 from a 1989 F350. I pulled the double cardan driveshaft and yoke from the F350. It probably needs all new u-joints, too. Will there be a problem keeping the F250 driveshaft, it seems to work fine, I drove with the 4x4 engaged today up to 50 mph and no vibration. Or is the F350 double cardan drive shaft better and worth the swap in? Looking for opinions here before I take the plunge. Also, I am planning on doing a 3" RSK/V code swap in the future. Is the F350 driveshaft better for that or will the F250 shaft work fine, too?