my first rear swap ?

[tubbedII]

My biggest concern would be to get the axle centered in the frame. There's a few different ways to do it, but the easiest would probably be just setting 9" on the new perches with the leafs installed and then measuring from hub to frame to make sure it's centered. If you're pinion angle is good as it is now, just get the angle it's at with the wheels off the ground, and weld the 9" at the same angle.

I don't think you'll need to worry about ride height because it should be pretty much the same it is now.