BBC Frame Mounts - Team Camaro Tech
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post #1 of 12 (permalink) Old Mar 15th, 10, 06:45 AM Thread Starter
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BBC Frame Mounts

I'm in the middle of a big block conversion and had a question about the frame mounts. I have the correct frame mounts which I ordered from NPD.

My question is, they attach in the same holes as the small block mounts, correct? No need to drill new holes?

I already had my trans cross member fitted for the big block by a body shop.

Thanks for the advise.
John
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post #2 of 12 (permalink) Old Mar 15th, 10, 07:07 AM
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Re: BBC Frame Mounts

No drilling to be done. Make sure you get correct motor mount / frame mount setup.
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post #3 of 12 (permalink) Old Mar 15th, 10, 09:29 AM
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Smile Re: BBC Frame Mounts

The Big Block transmission crossmember moves the transmission mounting location, 1/2" to the passenger side and 3/4" forward from the small blocks location.




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 #4 of 12 (permalink) Old Mar 15th, 10, 07:33 PM
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Re: BBC Frame Mounts

Quote:
Originally Posted by TJS69 View Post
The Big Block transmission crossmember moves the transmission mounting location, 1/2" to the passenger side and 3/4" forward from the small blocks location.



Guys, I'm having a tough time with this diagram. It seems to me the front of the car should be marked rear, and the rear of the car should be marked front. I have a BB 4 speed crossmember in my hand as of this writing. The slant under the x member should be top right which faces the rear.
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post #5 of 12 (permalink) Old Mar 16th, 10, 12:36 AM
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Smile Re: BBC Frame Mounts

The diagram is correct. The BBC is moved 1/2" to the passenger side and 3/4" forward from the small block location.

View it from underneath the car looking up. The actual picture of the crossmember shows the bolt holes for the shifter (on some years) is to the driver's side.

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

Last edited by TJS69; Mar 16th, 10 at 12:48 AM.
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post #6 of 12 (permalink) Old Mar 16th, 10, 06:09 AM
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Re: BBC Frame Mounts

Quote:
Originally Posted by TJS69 View Post
The diagram is correct. The BBC is moved 1/2" to the passenger side and 3/4" forward from the small block location.

View it from underneath the car looking up. The actual picture of the crossmember shows the bolt holes for the shifter (on some years) is to the driver's side.
Bolt holes for the shifter??? What bolt holes for the shifter??? Looking underneath the car the notch/slant(trans mount holes) should be on the right side. The cutout/indent on top of the crossmember is for the shifter correct?? If yes, its on the drivers side and if the cutout/indent is on the drivers side, then the notch/slant is on the right.
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post #7 of 12 (permalink) Old Mar 16th, 10, 06:37 AM
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Re: BBC Frame Mounts

Here is a photo.
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post #8 of 12 (permalink) Old Mar 16th, 10, 08:56 AM
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Re: BBC Frame Mounts

Yes, the three bolt holes on the edge of the crossmember are for OE shifter moiunting and they are on the drvr side.

On top of the crossmember where the trans mount interfaces/sits on, is slanted and the slant faces the front of the car.

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post #9 of 12 (permalink) Old Mar 16th, 10, 10:57 AM
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Re: BBC Frame Mounts

Quote:
Originally Posted by Everett#2390 View Post
Yes, the three bolt holes on the edge of the crossmember are for OE shifter moiunting and they are on the drvr side.

On top of the crossmember where the trans mount interfaces/sits on, is slanted and the slant faces the front of the car.
Figive me?? Isn't the shifter mounted on the side of the Muncie only with a BB mounting plate?? I didn't know the mounting plate bolted to the crossmember ?? If thats what you mean? Also I thought the cutout/indent on top of the crossmember was for the shifter. If what you say is correct, the cutout/indent on top of the crossmember is on the passenger side??? That maybe where my confusion is, I always thought that the indent was on the drivers side for the shifter.

Last edited by DT; Mar 16th, 10 at 11:35 AM.
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post #10 of 12 (permalink) Old Mar 16th, 10, 11:37 AM
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Re: BBC Frame Mounts

The 3 bolt holes are for the shifter. 2 on rear and 1 in front. There was no difference from BBC or SBC for shifter mount.
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post #11 of 12 (permalink) Old Mar 16th, 10, 01:27 PM
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Smile Re: BBC Frame Mounts

Not all the shifters mount to the crossmember... only certain years/transmissions do.

That cutout is not for the shifter. It is for clearance on certain transmissions.

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 #12 of 12 (permalink) Old Mar 16th, 10, 02:46 PM
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Re: BBC Frame Mounts

Oh Thanks Tom, for some reason, I thought that indent was for the shifter.
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