Found some wheels! What are they?

[66FBCharger]

I was looking for some things at my parent's house where I found a set of 4 wheels I had gotten when (I believe) I was working at a Dodge dealer in the mid 80's.
They are 15"x 6 1/2" steel wheels. They have a part number of 4037723 stamped at the valve stem location. They also have stamped in a circle SHD (super heavy duty?) in the lug nut area. They appear to have had full hubcaps on them at one time.
For some reason I think they are from a late 70's Ramcharger. The center hole is the same size as a '69 Charger and it is 5 lugs on 4 1/2" bolt circle.
Does anyone know what they are off of? Is there anything special about them?

[Budnicks]

Could be 70's Vintage Ramcharger or Power Wagon with the- 5 lug x 4.5" bolt pattern maybe/probably, could be a 15" wheel for Hemi Car or A12 or maybe an Imperial, Fifth Avenue, New Yorker, Station Wagon of some kind or Cop car maybe, one of those types of cars or something, most cars were 14" wheels, in the 60's-70's... Sorry, I don't know the parts #'s, it's just a wild ass guess...

[Ghoste]

Is there a date code on them?

[tan top]

Could be 70's Vintage Ramcharger or Power Wagon with the- 5 lug x 4.5" bolt pattern maybe/probably, could be a 15" wheel for Hemi Car or A12 or maybe an Imperial, Fifth Avenue, New Yorker, Station Wagon of some kind or Cop car maybe, one of those types of cars or something, most cars were 14" wheels, in the 60's-70's... Sorry, I don't know the parts #'s, it's just a wild ass guess...

      

was thinking  along the lines of a C.body  too

then found this 

http://board.moparts.org/ubbthreads/printthread.php?Cat=0&Board=QuestionAnswer&main=6774421&type=thread

[Ghoste]

Is that a certainty that the E-bodies used 14 inch?
Never mind, found it,   http://www.hamtramck-historical.com/images/dealerships/DealershipDataBook/1970/70_Challenger0020.jpg  so that cinches it being for the full size.

[66FBCharger]

Is there a date code on them?

They are stamped:
K2
8
I am assuming that means Feb. 1978.
They may be C body since they are marked SHD. The rims seem heavier than normal.

[Budnicks]

Could be 70's Vintage Ramcharger or Power Wagon with the- 5 lug x 4.5" bolt pattern maybe/probably, could be a 15" wheel for Hemi Car or A12 or maybe an Imperial, Fifth Avenue, New Yorker, Station Wagon of some kind or Cop car maybe, one of those types of cars or something, most cars were 14" wheels, in the 60's-70's... Sorry, I don't know the parts #'s, it's just a wild ass guess...

      

was thinking  along the lines of a C.body  too

then found this 

http://board.moparts.org/ubbthreads/printthread.php?Cat=0&Board=QuestionAnswer&main=6774421&type=thread