i'll participate since this is a much nicer and informative friday thread
than another weekly "tire" thread..
here is a partial list from memory for what i've done to my 84 sunroof
wolfy.. (most of these mods will pertain to all yr vanagons, but some are
specific to the 80-85 models)

-SA quad grille w/ HellaH4 headlights w/ 2 pos. factory fog switch in cluster

-Projektzwo lower foglites/bezels
-smoked SA turn sigs. (thanks Bill Kasper!)
-full fiberglass bodykit/bumpers/rocker trim etc from a '90 carat
-eurovan rear view windshield mount mirror (so i can see out the back window
instead of looking at the a/c ducting)
-overhead front a/c (actually, this was a dealer installed system when the
van was new, since sunroof vans didnt normally have a/c)
- cut out the spring steel rod holding the stock spare tire and replaced rod
thru hinges w/ bolts/nuts so i can put a 15" spare tire in the carrier
-SA "15 alloys w/ 215-75-15 tires (thanks for the trade, ken wilford!)
-power mirrors, painted body color (not hooked up, and never will be)
-SA"Volksiebus" decals (thanks james Cohen!)
-boston accoustics speakers in front doorpanels
-flimsy POS OEM dash cupholder from early vanagon (good for holding change,
tho!)
-carbon fiber shift knob (makes me think im in a racecar)
-the amazing, highly sought after "silver socket" from a vanagon westy
installed on the dash.  (actually, ive never even used it, it just is a
conversation piece)
- '82 audi 4000 gauge pod w/ 2 gauges installed in the heater diffuser cover
panel forward of the shifter (looks stock!)
- leather merkur Xr4Ti headrests (slide right into vanagon headrest sockets ,
minimal mod.  they adjust fwd and back (unlike stock vanagon headrests) and,
up and down)
- right side parcel tray from '80 vanagon transporter (these are found on
models w/o glove boxes) modified to fit the drivers side - under the dash and
around the strg column cover..  looks stock..  a great mod for 80-85 vanagon
owners and those who like to play with the dremel :<)
-the usual door pocket on the front pass door upgrade, but unlike most
people, i moved it back so it'd clear the glovebox BEFORE i drilled holes :<)
-added the usual grab handle to the drivers A pillar and didnt drill thru the
wires either :<)
-those cheezy rubber floormates that arent cut quite right that say "vanagon"
in way too big 80's style font on them, but hey, theyre better than nothing
-rubber cover for e-brake handle from 'rabbit/cabriolet (slips right on, no
freezing your hand in the morning anymore when you let the brake off)
-drivers dome light mounted over the pass door (theres a space for it already
there)
-20" wiper blade upgrade
-swival seat base welded to front pass seat from a westy
-cut out metal on top of seat pedestal about 3" under front pass front swival
seat base so you can actually store stuff underneath there (great atlas
storage area)
-CB radio mounted on heater diffuset cover
-fiamma 'freeway blaster" horn to replace anemic sounding vw horn
-SA mudflaps (thanks Ron Salmon!) installed w/ stainless steel screws (not
those cheezy clips they come with)
- Yakima roofracks w/ highrise system
- VWOA vanagon factory roof rack (looks like the bus one, but this is
actually made for the vanagon by VW)
-rear hatch VW emblem (actually a hatch lock cover emblem from a '98-2000 New
Beetle :<)
-reciever  hitch (thanks go-westy!) beefed up w/ extra 2" stock welded on
-3rd brake light mounted in reciever
-complete grey velour interior from '90 vanagon carat w/ jumpseats,
sidepanels w/ cupholders and flip out table, and rear sofabed. upgraded all
doorpanels to grey velour also. (i have another one of these interiors for
sale if anyones interested)
-rear shoulderbelts from '90-91 vanagon (the holes are already there under
the headliner)
-flourescent thinlite from carat
-rear mattress from '87 wolfy withOUT a/c sidepillar cutouts (that was hard
to find!)
-rear hatch "jailbars"  - actually was stock on the 84 wolfy's..
-full snap in curtain set, rear hatch screen, westy side windows - all stock
on 84 wolfy also.
-front windshield curtain from vanagon westy
-smoked lexan mongo sized sunroof air deflector by Climair for the vanagon
sunroof
-front table, arm, and mount from vanagon westy and extra mount on passengers
pedestal also
-westy LP tank mounted under slider door to run camp stove or lp heater
(still havent installed this yet)
-voltage inverter w/ outlet
-jumpseat storage trays
-rubber truck bed mat traced to the same shape as the stock vanagon carpet,
and installed in place of the carpet (no more dirty carpet!)
-rear slider door handle from 80-84 westy installed inside at rear
-flip out cupholders installed on the inner front passengers seat pedestal
a-la carat/wolfy, and also on the auto tranny shifter cover
-headlights relayed directly to battery for higher wattage
-rear hatch strut support (thanks Karl Bloss!)
-swival tab to cover slider door light switch (so interior lights dont stay
on all the time when the slider door is open)

plus more stuff that i cant remember now..
feel free to use my ideas and ask me questions on how i did mods or see pics
etc.
chris