68 Big Block Camaro.. Real Big Block Car???? - Team Camaro Tech
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post #1 of 28 (permalink) Old Aug 23rd, 06, 06:02 PM Thread Starter
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68 Big Block Camaro.. Real Big Block Car????

A friend of mine just bought a 68 RS/SS Camaro with no motor. He was told it was originally a 396 Big Block Car. The car has some really cool options like power windows, console w/ gauges, front disc brakes etc. I was wondering if some of you can help him out w/ what to look for to make sure it was an original big block car... It does have the original trans which is a TH-400 (#'s match).
Also, I know w/ 69's build sheets are hit or miss, is it the same w/ 68 Camaros? Is there anywhere on the car that may have a build sheet? Any help is always appreciated.
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post #2 of 28 (permalink) Old Aug 23rd, 06, 06:17 PM
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Lester
 
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Re: 68 Big Block Camaro.. Real Big Block Car????

CRG has a lot of good info. this may help. Q: How do I recognize the differences between first-generation high-performance models?

A: Here are a few of the more distinguishing characteristics. There are many other clues, both positive and negative, that are better explained in the more recent CRG Visual ID HyperTables, one for each year: 1967, 1968, 1969.

All 67-69 big-block cars are Super Sports, except for COPO models or dealer-modified cars like Yenkos, Baldwin-Motions, Nickeys, Danas, etc.
A car that originally came with a big-block engine, even if the engine is absent, will often still have the original big-block heater box, which is distinctly different from that of the small block or L-6 engine. The big-block heater core inlet and outlet penetrate the cover, whereas the small-block cover is unpierced - with the inlet and outlet coming through the firewall adjacent to the inboard end of the cover.
All 67-68 original 350 engines were Super Sports.
Original 67-69 302 engines were only installed on Z28s.
Original Muncie and THM400 transmissions were installed only on performance models of various types (the THM400 was only applied to big-block cars).
All 1968-69 performance models have multi-leaf rear springs. The Z28 typically received 4-leaf springs and all models with 350ci or higher displacement engines (including the L65 350ci 2BC engine) typically received 5-leaf springs. The 1968 L30/M20 also received multi-leaf springs. Spring count was weight dependent, however, and it is possible for certain Z28s to have a 5-leaf spring, or for a L30/M20 or 350ci engined car to have a 4-leaf spring.
All 67-69 performance models, with two exceptions, have the 8.875 inch diameter rear axle (aka, the "12-bolt" axle). The first exception is the 1967 L30/M20 from model start until approximately Dec '66, which came standard with a 10-bolt axle. Also (though 12-bolt versions have been noted and we are still researching this) many '69 SS-350s with the Powerglide transmission were equipped with a 10-bolt axle. However, it was possible for any '69 Camaro with the L48 or LM1 engine that would have normally had a 10-bolt axle to be optionally provided with a 12-bolt rear axle. 12-bolt axles were also installed on any car with the 1969 JL8 4-wheel disc brakes.
All 1968-69 models with the rear brake proportioning valve in the line under the drivers side door, are performance models. However JL8 4-wheel disc brake models did not use this valve, and so absence of the valve, in the case of a JL8 axle, does not mean that the car is not a performance model. There are also reports of a few very early 1969 performance models that were built without these valves.
A car with original factory air conditioning cannot be either a Z28, a L78 SS, or a COPO car (GM did not apply A/C units to solid-lifter motors).

Les Dixon member #68 1968 camaro RS/SS MR code L34 396 air convertible
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post #3 of 28 (permalink) Old Aug 23rd, 06, 07:30 PM
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Tony
 
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Re: 68 Big Block Camaro.. Real Big Block Car????

Check for original tire sticker and count the springs on the hood hinges. I believe 28 for original SS hood springs to account for the heavier hood ornamented hood.

1969 Camaro SS350, original motor/12 bolt/interior and build sheet in Fathom Green.
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post #4 of 28 (permalink) Old Aug 23rd, 06, 07:38 PM
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Question Re: 68 Big Block Camaro.. Real Big Block Car????

Quote:
Originally Posted by TClovis View Post
I believe 28 for original SS hood springs to account for the heavier hood ornamented hood.
Aint that funny. 28 coils for a SS and 26 for a Non SS. How many real SS's still have the original hood springs.


bob
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post #5 of 28 (permalink) Old Aug 23rd, 06, 07:39 PM
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Re: 68 Big Block Camaro.. Real Big Block Car????

If it has an original TH400 with a matching partial VIN, it was a big block car. No more research required. The TH400 only came behind a big block in a 1st gen.

Eric
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post #6 of 28 (permalink) Old Aug 23rd, 06, 08:57 PM
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Re: 68 Big Block Camaro.. Real Big Block Car????

heater hose location? going into the box or behind the valve cover?

68SS 396/375 L-78 Camaro
68 Chevelle
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post #7 of 28 (permalink) Old Aug 24th, 06, 04:01 AM Thread Starter
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Re: 68 Big Block Camaro.. Real Big Block Car????

Honestly, I haven't seen the car yet but will in the next week or so. I'll check some of these points and get back to the board. Sounds like the real deal w/ the 400 trans.
Any ideas on production numbers of a 68 RS/SS Big Block car????Also, since noone responded to the build sheet question, I take it he's not going to find one on a 68.
Thanks Again,
Mark
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post #8 of 28 (permalink) Old Aug 24th, 06, 04:15 AM
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Re: 68 Big Block Camaro.. Real Big Block Car????

Quote:
Originally Posted by Eric Kammerer View Post
If it has an original TH400 with a matching partial VIN, it was a big block car. No more research required. The TH400 only came behind a big block in a 1st gen.
Quite on the contrary..Post a pic of the trans stamp and vin tag whatever other #'s you may have.. My car has the THM400 also a big block big engine,block heater cover ...unfortunetly it was originally 327(fortunetly I was able to contact original owner who sent me pic's )..so I say keep on looking .
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post #9 of 28 (permalink) Old Aug 24th, 06, 07:03 AM
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Re: 68 Big Block Camaro.. Real Big Block Car????

Nothing really contrary about it...

For example, if the car VIN is 124378N3XXXXX, and the trans is stamped 8N3XXXXX, and the trans stamp is original, it was a BB car.

From the Nasty Z site: "On the THM400 the VIN is stamped on a machined surface just above the pan on the drivers side"

It (the TH400) could certainly be a restamp, but if someone had gone to that trouble I'd expect them to throw a retamped engine in too, and not sell it without an engine.

Eric
69 'vert project big block/TKO 600 RR
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post #10 of 28 (permalink) Old Aug 24th, 06, 04:17 PM
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Re: 68 Big Block Camaro.. Real Big Block Car????

Quote:
Originally Posted by Bgonz 69 View Post
Aint that funny. 28 coils for a SS and 26 for a Non SS. How many real SS's still have the original hood springs.


bob
Mine does.
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post #11 of 28 (permalink) Old Aug 25th, 06, 04:54 AM
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Re: 68 Big Block Camaro.. Real Big Block Car????

Quote:
Originally Posted by Bgonz 69 View Post
Aint that funny. 28 coils for a SS and 26 for a Non SS. How many real SS's still have the original hood springs.


bob
Mine still has the original springs...
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post #12 of 28 (permalink) Old Aug 25th, 06, 05:00 PM
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Re: 68 Big Block Camaro.. Real Big Block Car????

Mine too

Bob
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post #13 of 28 (permalink) Old Aug 25th, 06, 06:35 PM
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Re: 68 Big Block Camaro.. Real Big Block Car????

double post.

Les Dixon member #68 1968 camaro RS/SS MR code L34 396 air convertible

Last edited by mr396; Aug 25th, 06 at 06:50 PM. Reason: double post
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post #14 of 28 (permalink) Old Aug 25th, 06, 06:47 PM
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Lester
 
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Re: 68 Big Block Camaro.. Real Big Block Car????

On the 1968 camaro TH400 it had a tag that would tell you the hp ratings. If the tag is still on it, it could tell you what engine was in it. If it has 68Cxxx it's for a L35 325 hp, 68Exxx L34 350 hp..... I just counted the coils on my 68 bb hood and I come up with 29 coils.

Les Dixon member #68 1968 camaro RS/SS MR code L34 396 air convertible
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post #15 of 28 (permalink) Old Aug 25th, 06, 11:18 PM
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Re: 68 Big Block Camaro.. Real Big Block Car????

Uh, add me to that list. Original bigger hood springs that is. I thought they were 28 but I guess 29's a possibility.

1969 Camaro SS350, original motor/12 bolt/interior and build sheet in Fathom Green.
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