Help with Detroit locker info

[408sbfmustang]

Hello
I have a One of those NASCAR 9" 3rd member with a Detroit locker in it. I'm trying to figure out what spring is inside of it. Looks like an natural color.

Scribed on the locker case is.

170
N178A
71773
28A03

Thanks

[Build-It-Break-it]

Have you tried calling rousch Yates performance to see if they can identify it?

[Flash68]

Roush was no help when I called them about mine... bought from them.

Ron Sutton might be able to help. I just went and bought the proper spring from him for mine.