seat bracket/ tracks options

[DBear]

Hey guys, need some help on seat tracks for some buckets I have. I have a set of low back buckets from an 89 1500 exr cab. I want to put them in my 71 K5, which has no seats currently. I need some tracks that will pivot up like the factory seat does. Any ideas on what seats from what years would work? I don't mind the part of mating them to the bottom of the buckets I have, just want them to raise up and forward like the stock ones do. Thanks for any help you can provide!