How to get speedometer to work in 1980 z28


I currently am working on my project and now stumped on how to fix this issue. I have an 1980 z28 and it has a 3rd Gen Borg Warner 5 speed in it. I can not figure out what I need in order to connect my spedo cable and make this work. I've check my rear code and it has 2PE on it which should be 3:42. Can anyone provide me with any information on what i could do whether it be using a spedo housing from another year mode ect. Thanks.