Dana 60 questions

[Rat66]

I am going to look at a donor truck this weekend. It is a 68 C20 with a Dana 60 in it. I have a 66 C20 with an Eaton in it. I am looking to make my truck run better on the highway. It is my understanding that the Dana 60s had 3.54:1 ratios. I think this would work well I think.

Questions:
1. I assume that because it is a Dana 60 I could change the ratio fairly easily? Meaning many options as compared to the Eaton.

2. What is the width difference between my Eaton and the Dana?

3. Did they come from the factory with any other ratios in this year?

4. If it is a coil sprung rear, will it bolt right into my coil sprung rear?

5. Will I need to alter my driveline?

Thanks!