help to identify rear spring part number

[Jeffro]

The rear spring on my 70 LT1. has the following marking in lime green.

21-309-219 JRS

I am assuming it's not the original but I would like to know the origin.

Any help would be appreciated.

Jeffro

 

[Michel73]

Jeffro,
I can't help you with your rear spring question but you e-mailed me about the DFW C3 group. You left no way for me to contact you. Send me another e-mail with your return e-mail.

Thanks - Michel