67-69 Engine frame brackets ?? - Team Camaro Tech
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post #1 of 7 (permalink) Old Mar 20th, 19, 09:42 AM Thread Starter
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Tom
 
Join Date: Sep 2005
Location: Copenhagen - Denmark
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67-69 Engine frame brackets ??

Hey there. - I have been told to use different heights frame brakets Lh/Rh for a V8 BigBlock, - are due to move the engine a little to the right side of the engine compartment to make space for the booster. - Okay :-)

Questions Now:
-What if you ordered a big block without a booster at the factory - would it also have uneven frame brackets ??

-And what about Frame Brackets for V8 Smallblocks:
Why are they different (the same height - Rh/Lh) in height if it is a 283, a 302, a 307cu. or a 350 cu. - according to Classic Industries Catalog ???

T2UL
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post #2 of 7 (permalink) Old Mar 20th, 19, 09:46 AM
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Re: 67-69 Engine frame brackets ??

My understanding is the BB is tilted towards PS because it needs to clear steering box. Because of this the BB also uses a different fan shroud vs the SB WITH AC as the motor is off center
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post #3 of 7 (permalink) Old Mar 21st, 19, 08:32 AM
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Brian
 
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Re: 67-69 Engine frame brackets ??

The frame stands were different heights to shift the BBs toward the passenger side to gain clearance between the exhaust manifolds and the steering box. That is also why the BB cars have a different heater core in them since it is all but impossible to get the heater hoses on a 6cyl/SB heater core in a BB car. Offsetting the engine had nothing to do with booster clearance that I am aware of.

Experience...... It's what you get when you didn't get what you wanted.
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post #4 of 7 (permalink) Old Mar 21st, 19, 12:54 PM
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Tom
 
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Red face Re: 67-69 Engine frame brackets ??

The big block is offset 1/2" to the passenger and 3/4's" forward of the small blocks location. Most importantly you must change the transmission crossmember to match. If this is not done, the engine will sit crooked and headers or exhaust manifolds may hit the steering box. The small block framestands are also a little different in height, but not by much.The small blocks are considered to be "on center".

This chart may answer a few questions or create more questions !


69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau GTSII seats, 700R4 transmission, 12-bolt w/Eaton 4.11:1
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post #5 of 7 (permalink) Old Mar 21st, 19, 01:55 PM
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Re: 67-69 Engine frame brackets ??

The fan shroud is also specific to BB because of the "offset" motor position and it is 3/4" further forward

BB radiator was in SB cars with AC but the fan shroud for those SB cars with AC the fan shroud is specific to the SB as the fan/motor is center vs offset like BB
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post #6 of 7 (permalink) Old Mar 21st, 19, 02:18 PM
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Dave
 
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Re: 67-69 Engine frame brackets ??

Finally there are two sets of BBC frame stands (none of which are available as an OEM service part today, so you depend upon the legendary quality standards of off shore producers). This means that you must measure all dimensions of the reproduction before you waste your time and Band Aides bolting them onto your sub frame!!!!).

There are one set of BBC Frame Stands for the 1967 and 1968 Camaro, and a different set for the 1969 Camaro. The difference between the two is in the motor mount used.

The “short and wide” version (used from 1958 through 1968) measures 2⅝ inches between the ears, and 1¾ inches from the engine mount surface to the center of the mounting-bolt hole. The “tall and narrow” mount (used from 1969-'72) measures 2⅜ inches between the mount ears, and 2 3/16 inches from the engine mount surface to the center of mounting-bolt hole. The mount has to fit the frame stand. Or if you are buying the frame stands buy a set to fit your mounts as most corner auto part stores only sell the 1969-'72 engine mount. A BBC motor mount was always an interlocking mount not a vulcanized (glued together) motor mount.

The Chinese no speakee Enguish. They copy items (poorly) and sell them on the cheap because they use recycled (not virgin Steel) and labor fresh off the rice farm. They may put the wrong part in a box with the correct part number, and the only person that checks is you. (so be certain about the return policy ).

In case you are wondering why you have to jump through these hoops blame this Ambulance Chaser:

https://www.autosafety.org/chevrolet-motor-mounts/

Big Dave
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post #7 of 7 (permalink) Old Mar 21st, 19, 02:39 PM
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Re: 67-69 Engine frame brackets ??

Quote:
Originally Posted by Larger Dave View Post
In case you are wondering why you have to jump through these hoops blame this Ambulance Chaser:

https://www.autosafety.org/chevrolet-motor-mounts/

Big Dave
Ah yes the Corvair killer guy.

Had a guy who claims he worked in the Van Nuys plant back when 1st Gen's came out. He has come up to my car twice to point out various "incorrect" things on my car. DISCLAIMER...I m not one of those who gives a F weather I have the correct bolt or washer or anything else for that matter on the car. If you do for your car fine.

Anyway he said I needed to get one of the cable things GM put on instead of replacing motor mounts or my engine would go through the radiator as he said he has seen that happen.

I asked.."so both motor mounts break, and all transmission to block bolts break or the rear motor mount breaks away from crossmember, floor shifter shears off, transmission lines get sheared and the engine flies into radiator"?


his answer was "well IDK...but the motor goes through the radiator if you don't put on the cable".

I have had a 55, 57,67 & 70 "Chevy" all using these supposedly inferior motor mounts and I have managed to dodge this carnage (read BS)….YMMV

...and yeah the off shore re-pop crap is.....crap so user triple check those parts for fit & quality
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