Dana 60 swap

The dana truck axle are thick adding weight that a car dana does not have.
The dana power lock weighs more than an 8 3/4 power lock but when you change to a spool they are only a pound or 2 differant.
As for axles and brakes. The 35 spline axles are what you want over the 30 spline. To save weight you can go to disc brakes.
The cost of axles and brake are the same for both axles.
The cost of gears and spool for a dana I have found to be cheaper for the dana.
The 8 3/4 housing cost more to start with than the dana truck housing.
If you cut down a b body or e body 8 3/4 you can use the original housing ends but will probably need new spring pads.
The dana will need housing ends and spring pads.
So the labor cost of the narrowing of housing is the same.
The main difference in cost between narrowing and 8 3/4 and a Dana is the cost of the axle housings themselves.
Dana truck axles run from $125 to $250 around here.
8 3/4 a body housing are $400 to $600 and b body and e body are $125 to $250.