Bench seat question?

[Rob H.]

I'm getting ready to put the bench seat out of my 70 parts burb in my 72 C/10. The rear support leg on the drivers side slider assembly is broken, so I thought easy fix just bolt on the one from the 72 seat. Wrong, the support is differant and the seat bottom itself is differant as far as the ange of how they bolt on. I guess my question is, is there a differance in a burb bench and a truck bench, or were the supports changed between 70 and 72? I'll make it work, but this just made me curious.