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3417 (white) & 3418 (black) is the rear body mount for MT and oval (pre-Stealth)
3407 is the MT front body mount

Trinity Street Spec:

https://www.rc10talk.com/viewtopic.php?t=49542

...with Associated 4115 front suspension.

Thanks @jcwrks. I'm pretty sure I bought the all black ones as NOS in bags, so unless glue or black marker was done at the factory, I don't think that was it. Upon close inspection under magnification I can see there is definitely a core. I suspect the core may be black G10. It also looks like the ...

Proline Magnum 3019

Click to enlarge: