Topside: 10-4, I figured the housing had to be straight as possible.

Cab, are you saying apply heat 1-3" away from the center casting? I was applying heat in the center of the tube (half way between the center casting and the bearing end. I have a Mark Williams narrowing fixture I'm using to check straightness. It is a 2.5" precision ground bar with three steel bushings. Two bushings locate in the carrier bearing saddles and the other slides into the axle bearing housing.