When the now famous Porsche 935 came out in the 1970's, it sported a new front design which eliminated the 911's round headlights, thus forming a totally flat hood, or "slant nose" (or slope nose). After market companies quickly got a hold of this design and began converting regular 911s to the slant nose form. It wasn't until the mid 1980's that the Porsche factory began offering the Slant Nose body option to the 911 Carrera or 930 Turbo. You could get just about every combination: the Carrera Slant Nose, in Coupe, Targa, or Cabriolet form, or the 930S, meaning Turbo Slant Nose, which came in all three body forms as well.
It is very hard to tell the difference
between an original factory Slant, and an after market conversion.
Here are a few guidelines to go by when diagnosing the 911:
CHARACTERISTICS OF AN AFTER MARKET JOB:
1) 4 studs at
the four corners on the underside of the louvers
2) Splash guards
attached to the 4 studs
3) Imperfect
headlight door jambs
4) Japanese
headlight motors
5) Wiring to
lighting
6) Welded light
buckets that intrude onto the wheel hose skirts
7) Evident mig-welding
of 3 separate insert panels to factory fender
8) Windshield
washer reservoir in left fender changed (or cut down)
9) Dents in
the battery area of the shirt to fit under buckets
10) Cut out
of the bumper shock support to fit buckets
11) Composite
or plastic rear vent slats
12) No octane
sticker on back of fabricated gas lid door
CHARACTERISTICS OF THE REAL DEAL:
1) Wood rear
vent slats
2) Dual oil
cooler in rear qtr vents with screens
3) Jack extensions
extended factory welded to rockers
4) Factory stamped
part number on rocker panels
5) Two piece
rear vent hole
6) Exact die
cuts in the corners of louvers
Hopefully with this information you
can determine if the 911 in question is in fact a factory Slant Nose or
not.