My 84K10 Scottsdale with the plow package came with the following RPOs:

CD4	Intermittent wipers
D45	Mirrors, the chrome and stainless ones--not the semi-truck type mirrors
F60	Heavy duty front springs (3 leaves instead of two)
K34	Electronic cruise (instead of mechanical box)
MX0	THM-700-R4
U35	Quartz electric clock that went in the lower left gauge pod
V02	Radiator with "extra capacity" transmission cooler
V76	Tow hooks
YES	235x75r15 rubber
XES	235x75r15 rubber
ZES	235x75r15 rubber
ZY1	Solid paint
Z75	Quad front shocks
29L	GM Midnight Blue #29
A01	All windows tinted
C60	Air conditioning
E63	Fleetside box
GQ1	Standard rear axle ratio (for my year truck that was 2.73--AKA airplane gears)
LE9	305 V8 4bbl high compression.  Same as a 305 HO in cars only different cam.
N33	Tilt steering
U58	AM/FM Stereo without cassette
V22	Deluxe Front Appearance (AKA quad headlights)
Z62	Scottsdale trim
23W	Blue vinyl interior