Last code on 68 Fender tag..

[Shark1010]

Trying to figure out the last code that shows as unknown on my '68 Roadrunner.
I think the rest of the codes I have a good idea on but feel free to comment on any.
My problem is C-4.

2 door coupe
383 4bbl HP
4-speed 833
Jan, 10th 1968?
F70x14 whitewall steel
3.54/3.55 Dana / 8&3/4 Suregrip
High trim grade
Vinyl split bench
Interior - White, Red
Monotone Red roof and body,
Burgundy metallic door frame w/ white pin stripe
26" radiator
Decor package
rear speaker
am+8-track player
Tachometer
Tinted windshield
roadrunner hood
hood/fender turn signals
drip rail moldings
B-pillar moldings
Sold car when built *ordered*

But what is C4? Thanks!

 

[PP1RT]

Heavy duty suspension with sway bar. C is for suspension. 4 is for code 624 which is the above. Does this match up to your car?

 

[69Coronetrt]

Typically found on STL built RM21 cars up until about the time the RM23 cars came out ~ mid January.

 

[Shark1010]

Yes I believe that is the correct code as it seems to match the suspension, Thanks! I wasn't sure but that cleared it up quick!