Give Bill Reilly a call at:
http://www.reillymotorsports.com
A 77 Cordoba is a B-body, so you might be able to get an Alterkation to work on the front with some minor modifications. I think the biggest change is that the K-Frame is an isolated design (starting in 73 I believe). Bill will know if it will work and what mods are needed. I am almost sure someone from moparts.com put one in a 73 Charger (which is essentially the same).
As far as rear suspension - You'll have to shop around - it's going to take some customization. I think that Bill is working on one of those as well for a B-body (may be available already).
Good luck and post some pics!