blazer rear width
 

The rear axle in the k5 blazers ( at least the 80's years ) is about 3 inches narrower than the front. Don't know why it's designed that way, but it is. Looks bad. 1 1/2" spacers are available to space the wheels out but I don't care for spacers myself. Is there another truck axle that is wider,6 lug,and will bolt in the blazer? Sure would look better. Thanks, Boog out.

The 70-72 axles are 57"wide
73-up are 56or 56-1/4"wide,
and the 63-69 axles are 55-1/2"wide

Back plate to back plate)
Only other axles wider that Ive seen are the Van axles, they are 61" wide.

Get some less backspaced wheels for the back to narrow it, or more backspaced for the front, to widen it.

Spacers are a big no-no !