No, the 1.25 bars are for the front, they bolt right up. Duallies have a good size rear bar, but they have a big cast mount plate for the axle end that is sized to the big dually tubes. I'm certain you could make something work, if you really wanted to. Plus they're sized width wise to the leafer setup in the squarebody trucks. I'm fixin' to measure the s-10 blazer rear bars and see what's up, some of them are real chunky. I was lookin to do the rear bar from a Camaro/TA as seen here-
http://67-72chevytrucks.com/vboard/s...507111&page=12
but they are pathetically small unless you find a FE3/WS6 car, and good luck with that! So, I'ma explore some options. Hoping to do some thing this week even if it's wrong!