K member id

[nicka]

Cleaning up the K member and ran into a few markings. My '71 Barracuda was a late June build with "S13" Suspension H.D.  with Sway Bar.  There's no skid plate and no "coin".  I did find these two markings.  Correct K member for a small block V8 in '71?

[Skdmark]

My May of 71 Challenger R/T does not have a coin or skid plate either. S13 big block.
Coins seem to be hit or miss. My 71 Barracuda with a 318 has one.

The date code is typically found front center face of K frame.
4 digits long for example:
0770 = 77th day of 1970

[nicka]

If I'm reading the "221" right, that makes into June which would make it just before the VON of 6/28.  The "04..."  is throwing me off.  Not sure what that means. Comparing with other K members, looks like it is for a 318, 340, or 383 which is correct for the Barracuda.

[Skdmark]

Both of my cars have "52" on the broadcast sheet under FRAME.
One is regular suspension / no sway bar 318 (with coin) early build and the other is HD suspension with sway bar and a 383 (no coin) late build.
I suspect yours is the same model K frame.

Besides part numbers and date codes, those numbers could be related to a vendor number or stamping ID number used prior to welding.
Sorry can't be more help.

[340challconvert]

A k frame chart I have on file:

Here's the 1970-71 K-Frame numbers[/i]

10   #2962010 Crossmember (K-Frame) 225 Engine
12   #2962012 Crossmember (K-Frame) 318, 340 & 383 Engines
14   #2962014 Crossmember (K-Frame) 426 Hemi w/ Skid
52   #3583052 Crossmember (K-Frame) 318, 340, 340 T/A & AAR, & 383 Engines
70   #3583070 Crossmember (K-Frame) 198 & 225 Engines
74   #3583074 Crossmember (K-Frame) 318, 340, 383 & (440 w/ Skid) Engines
76   #3583076 Crossmember (K-Frame) 426 Hemi w/ Skid
77   #3466477 Crossmember (K-Frame) 318, 383 & 440 (440 w/ Skid) Engines

[nicka]

So here's what I found in the front of the center.   155   1

[anlauto]

So here's what I found in the front of the center.   155   1

That's the date code 155th day of 1971

[Skdmark]

Congrats on finding it!

155 of 71 = June 4th of 71

[nicka]

I just checked the broadcast sheet and getting "52" under FRAME.