There's a Grainger in Tucson at 3415 S. Dodge Blvd. They might have them in stock.
Looks like it's about 2 blocks from Fastenal.
Their web site only sells them in bulk. Are they more flexible if you show up in person?
There's a Grainger in Tucson at 3415 S. Dodge Blvd. They might have them in stock.
Looks like it's about 2 blocks from Fastenal.

I didn't use carriage bolts. I used the hex bolts that came in the ORD kit w/ the 1" body lift. It doesn't matter except personal preference. Grade 5 is fine also. The body will pull apart before you need the strength of a grade 8.
I might have some of those bolts from lmc I could send your way. I ended up using standard grade 8 bolts.
I figured I'd post this here incase it helps someone down the line.
Stock body mount bolts on a '90 K5 are:
Grade 5, 1/2 diameter, 13 thread count.
(2) at 6.5" long carriage bolt (rear most bolts)
(2) at 3" long carriage bolt (bed bolts)
(4) at 3.5" flange bolt (or regular with SAE washers - 2/side under the rockers)
(2) at 5" flange or reg + washer for core support.
If you're replacing the nuts, you'll need 6. The other four are captured nuts.
I'm assuming this info is true of all the V-series Blazers, and probably also for earlier K-series Blazers, at least back to 1981. I use that as my cut-off date for reliability because I used a Daystar body mount bushing kit that was for K5s from '81 to '91. Since I used a 1" body lift, I added 1" to those lengths for my replacement bolts.
It's from this thread: http://coloradok5.com/forums/showthread.php?t=308391

I just use a 2x6 about 18" long and jack it up with a floor jack. You only need to get the weight off of it, not lift it off completely. Of course you'll have to go high enough to unload your suspension.