I am switching my 76 mach1 from power steering to a manual rack. I have a bought a manual rack from the same year at my parts shop. i have noticed that the shaft is a different length and diameter. I have looked through all the threads and everyone says that bought something to extend the steering shaft up to the rag joint but what is that part? i have looked through jegs and summit but i cant find it anywhere? can anybody maybe show me a part number through those place or partsamerica.com that would be great appreciated. thanks