I have a stash of 15" and 14" steel wheels I've accumulated from parting out cars- I'm wondering what I should look for as far as ID the wheels as far as year and such. Where are the date codes found, and which ones are the rare ones to look out for? Is there a source for these numbers anywhere? Thanks!

anyone?

Asking for an all answering "How do I identify rare wheels?" isn't a simple post.
MOPAR '68 - '71 steel wheels of interest would be:
small bolt 14 x 5-1/2"
large bolt 14 x 6"
large bolt 15 x 6"
large bolt 15 x 7"

some have part numbers and/or date codes ... some don't
pre-'68 and post '71 ... a different story or two

ok maybe this will help
this example is a 70 71 rallye (closer to 71 Pictured) shows the layout of numbers
steel wheels should be the same

550 ramcharger wheels
year 7
month 4
date 29

450 Wheels


"H" wheel: