Thanks for the info. I was not planning on upgrading to vented disks unless I could do it without changing calipers. The calipers on these old trucks are pretty impressive considering the year they're made. I got 180k out of the old disks, I think OEM replacements should make it okay. I will upgrade to stainless lines though when I do this. I already have them in the garage ready to go. Just need to find the disks????