Build Sheet Question - Leaf Springs

[Coralsnake]

Ed there is a guy working on this now
I can send you his contact

Does anyone know how the C9ZX springs were marked?

[Dennis Y]

Bob --- sorry, maybe I mis-phrased my question as I did not know if anyone had the measurements for the Boss 302 springs and was just musing which springs were made first.

Jeff --- what is the early build date of your Boss

Ed --- looks like Shelbymann1970 also has a SMS lower leaf that he is using with his person to reproduce.

Gary -- keep us up to date with your endeavor. I"m sure a lot of us would be interested.

To all --- thanks to everyone for their input. I have seen this topic come up a few times over the years and just seems to loose steam for whatever reason. Hopefully this time a solution can be found.

I know I lack a lot of the knowledge of most on here but just trying to participate and help find answers

Thank you all!.

[sg66]

Bob --- sorry, maybe I mis-phrased my question as I did not know if anyone had the measurements for the Boss 302 springs and was just musing which springs were made first.

Page 25 of this Spring Research version has the 1970 B302 measurements. https://springresearch.org/pdf/volume_18.pdf

These were written specifically for aftermarket manufactures to build to OEM (or very close) specs. Note that the B302 spring is assigned the same 42-503 number as the GT 350/500 replacement however the free arch of the the OEM is 1/4" different.

I have no doubt the OEM springs are visually different as pointed out already.

[shelbymann1970]

We were working on the s9ms springs back when chris brown passed RIP ole buddy and chris had a machine shop making the unique lower flat leaf and stampping the #s since the rest of the spring can be found from other springs. I sent an odd s9ms lower leaf i had here to chris but not sure if i got it back but if someone wants to finish making the spring i can loan my s9ms leaf out.

got a local guy who wants to see my spring to make some up. The guy who is the " middle man" owns a 70 drag pack car he bought early 70s and bought new springs (D0) and all the cables and battery tray for boss 9 to put a trunk mounted battery into his 70 when he worked the parts counter at a ford dealership. Realized decades later the D0 springs he out on are not correct so his friend is embarking on making some springs. This Shelby owner when he worked at GM gave Max thousands of fastener blueprints so AMK could do GM fasteners.

[Tor]

My car 48-1014 produced 21 of february has the S9SMS-556A springs

Tor

[69 GT350 Vert]

I'd like to get my 5RS68 springs re-arched if anyone is is still doing it.  It probably won't be permanent but it should help reduce sagging for a few years. 

[Bob Gaines]

I'd like to get my 5RS68 springs re-arched if anyone is is still doing it.  It probably won't be permanent but it should help reduce sagging for a few years. 

We have several places in KC that do re aching of leaf springs. I would double check in your area with the truck repair community for spring re-arching. I get the impression it is still a widely available service.

[shelbymann1970]

I'm lucky as I have  Eaton Springs " in my backyard".