Interior upgrade

[will2k2]

I have a 1975 Cheyenne. I am considering upgrading to a newer interior, circa 83-86, and I am needing to know how difficult this is to do, and if there are any things I need to know in advance.

I realize that it will be necessary to use the later wiring harness because of the later guages and the stalk controls.

What about the dash pad? Is the newer flat-style interchangeable with the older style that I have? Tilt steering column?

For reference, my truck does not have cruise control, but it does(or did) have AC. No power anything except brakes and steering.

Thanks!