1970 Corvette Registry
Photographic Library of
Mechanical Details, Details, Details!


If you have any photographs or diagrams you would like to include, please e-mail or snail mail the technical specifications and a high resolution JPG image and I'd be delighted to add it to the 1970 Corvette Registry Photographic Library! (Be sure to send a SASE if you need stuff returned via snail mail.)

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Description and Application

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Click for page with many more closeup photos.

AC Compressor. Original from 1970 base engine convertible.  Vehicle #04102, B18 build date.


Exhaust manifold with engine paint overspray on the passenger side, up near the firewall.  Early LS-5.  Vehicle #00531, built 09 Jan, 1970.


Valve cover sticker "CZU" from Christian's '70 LS-5.  These are rare as hen's teeth!   Vehicle #00531, built 09 Jan, 1970.



Air Filter Comparison: Top row compares one original style vs. reproduction style AC329CW air filter  metal mesh used on the dual snorkel setup. The AC212CW filter was used on '70s equipped with the open air element setup.  Production transitioned from the open element air filter to the dual snorkel setup late in the 1970 model year for all cars except LT-1s (which retained the open air filter setup through 1972).  The differences in the metal mesh configuration applies to both filters.  Note the intersection of the mesh wires on the original, and the stamped & pulled flat metal look of the replacement mesh.  Original paper filter elements were oil coated and will have a similar yellowish patina (and oil smell).  Replacements use a resin coating.  Original elements have "BEST WAY TO PROTECT YOUR ENGINE - REPLACE WITH AC TYPE ..." printed in white letters on the face of the black Plastisol surface. Some reproductions state only "PROTECT YOUR ENGINE..." Also note the detail around the 'cutout' on this surface.  There is a second original AC212CW outer support mesh configuration which was used during the 1970 model year.  It has a vertical and horizontal oriented square mesh wire.  Wires on these were welded at the intersections and the mesh was then galvanized.  Another third style seen on NOS examples is similar to the second welded wire mesh style, however the mesh is oriented on the bias instead.  Search the NCRS board for an exhaustive 'separate the pepper from the fly s&*t' discussion 7/2/02.    Photos taken at the NCRS Galveston Regional Advanced Judging School, Fall 2000.








1970 LS-5 454 Rochester Quadra-Jet Carburetor.  This was removed from the car in 1970 and stored for 25 years until Don purchased it.  Note the markings and the idle solenoid.  VIN number is unknown.


Installation of windshield washer bag reservoir, Base engine TH400 AC equipped (#04102, B18 Build date).


This is the coolest set of stamp pad photographs!  You can very clearly see the marks made by the big broaching machines at the factory back in 1970.  The broach marks are the little grooves which run parallel to the crank shaft.  If you look real closely at the "C" you can see a second "C", and with the naked eye, one can even see a third "C", where the guy practiced before the big blow.  Thank you Chris for sharing these gems! (#00531, A09 Vehicle Build date).


L-46 (350/350) engine Stamp Pad photograph. 70S402650 V0127CTJ (#02650 B05 Vehicle Build date)


LT-1 (350/370) engine Stamp Pad photograph. 70S403452 V0105CTU (#04352 B11 Vehicle Build date)


Base engine Stamp Pad photograph.  70S412161 V0609CTG  (#12161 F13 Vehicle Build date)


L-46 (350/350) engine Stamp Pad photograph. 70S404826 V0219CTJ (#04826)


L-46 with Alternate VIN Derivative stamp location - this alternate location is more commonly found on Camaro's but there have been documented cases where during the initial days of 1970 Corvette production the VIN derivative was stamped near the oil filter.  (#00307, A06 Build Date)


Factory Grease pencil markings showing through on the original engine block paint.  Base engine Auto CTG car (#4102 B18 Build date).


Factory Grease pencil markings showing through on the original engine block paint.  LT-1 M21 CTU car (Car #00538, A09 Build Date)


These shots show typical lack of paint coverage on the rear of the oil pan.  LT-1 M21 CTU car (Car #00538, A09 Build Date)


The factory masked the aluminum valve covers on the L-46 (350/350) engines before painting.  The location of the mask on the rear side of the driver side head is evident in this photo of Bill's car.  Notice the obvious difference between passenger and driver side masking jobs.  (#02650 Feb 05 build date)


Hood Hinge blackout pattern on this original paint car.  The hood support rivet is an anomaly according to the NCRS TIM&JG.  Vehicle #00531, built 09 Jan, 1970.


Schematic of the 7040202 Vacuum Advance Tube.  This elusive item was originally found on 350 cu.in. engined 1970 Corvettes.  The carburetor end has a single flare, and the TCS solenoid end (long leg) was simply cut.



These photos show the difference between brush painted ignition shielding supports found on cars with aluminum intake manifolds, and spray painted ignition shielding support brackets as found on cars with painted intake manifolds.  The left photo is from Gary's November '71 built 1972 Model LT-1 engine. 


1970 NA9 California Delivered Vehicle Carburetor Heat Shield and Installation.  (#02802 Feb 05 Build Date, Base Engine, 4-spd car).


Quadrajet part numbers 7040207 DA (L-46 4-spd), build date 3529 (Julian code, Day #352 of 1969).   (From Bill's car, #02650 Feb 05 build date)


One of the RAREST corvette alternator's of all time - #1100884, 1970 only corvette part on AC and some LT-1 equipped vehicles.  Original alternators are stamped with 61A and the A dropped down somewhat as seen here.  Also take note of the casting seams on the case - rumor has it there are some 'fakes' out there with the casting seams in the wrong place.  If you've got any pictures of an imposter please send me one!   Bill
Emissions sticker from a LS-5 454/390 Hp engine.  Vehicle #00531, built 09 Jan, 1970. Christian

Emissions sticker from a base engine car V0409CTD.  (Vehicle #11477, built 06 June, 1970)


Actuator for the fresh air plenum door located behind the gauge console. The 'pod' is situated between the back of the duct and the inner firewall so not many of these are actually seen. I am assuming that the green W is an inspection mark.   Vehicle #06237, build date C10.


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