Build date of July 1972 on a 1974 model year.

dnielsen said
Here is a rundown of the tag:

M21 R11 V8W V9W Y16
V4W U A64 B41 G51 H51
KY4 D2Y 000 702 893490
E24 D34 VL29 C4G 273540

The only dead-ends I see are A64, G51, and V9W. The decoder I used says these are unknown so if anybody know more, let me know.

Thanks to 72blunblu as well.

A64 is the Gold Duster package. G51 is LH outside mirror, manual, chrome. V9 is 73- 74 Sport Stripes Up and Over Tape and 72-74 hood sport stripes. W is white.

EDITED