Some pics of the underside.
I'm trying to figure out if the rear has an add-a-leaf added, or if, suddenly, in 1990, after 20 years of making tail-dragging half-ton trucks, Chevy suddenly decided to fix the problem. Doubt it.
The 2nd leaf seems to be an add-a-leaf, making 5 leaves plus overload. However, on the first page, 2insane posted a pic of a stock blazer suspension, which actually has 6 leaves plus overload.
Moving to the front, I know that some "heavy" 1/2ton pickups came with a 3-leaf front; I didn't know that blazers did. Is there a plow package? RPO VYU? I'll have to check the codes. The 3pack doesn't seem to be doing much. I added a 3rd leaf to my '74 and it sat pretty flat, even holding up a 396.
There's no obvious evidence that this formerly had a plow on it, but I could take a closer look.
Also, the pic of the transfercase output shows the slipyoke to be a little extended, indicating to me that it's not at stock height.
I think that this weekend will be "install axles time", whether or not I lift it.