They are for a SB step 1 5/8-1 3/4 for everything BUT A body cars.
B/E
Now for the A body...
Notice the last tube on drivers side of the A's, runs just a little different than the ones being sold. Heck, call tti and send them a picture.
If I wasn't truthful about what they fit, you can come get them for exactly what they cost to get them here at my place, purchase + shipping. I was truthful! The drivers side is not for an A body and will need significant work or repair to make them right for whatever they end up on.