I know that the f body bar we look for as b-body owners is from what I believe was called the ?ws-6? suspension, regardless, it was from the sport package cars like the Z28, so that is specifically what I was looking for. I also would love to go crawling around junkyards, it's just that they don't allow you to do that around here, you've got to go to the front, say what you want, and then they go get it for you. My question was that both of these were supposedly from the '70-81 fbody sport package years, and yet not the same diameter. I'm just a little confused, they're both close to 1.25 ( by my guesstimate) was there a 1.125 during those years? I don't know, I've had a few too many drinks over the past hour or two to be continuing this dialogue. Anyone other thoughts?