I have a pair of KYB 4507's that I took off of the front of my '70 Sport Fury GT. No issues with them, just going in another direction. $25 for the pair plus the ride.
I really couldn't tell you as they were on the car when I had bought it earlier this year. They were pretty clean though, if that's any indication, as front end parts tend to get dirty pretty quick. I took them off when I pulled the front end apart and opted to install a matching set (front and rear) of Gabriels when I put it back together.
I have these on my car with the 1.12 t bars. If you're thinking of adding the aftermarket bigger bars you need more shock like these. The Gabriel's and Monroe's don't cut it