Author Topic: 1969 Big Block Motor Mount Brackets?  (Read 1498 times)

red69

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1969 Big Block Motor Mount Brackets?
« on: March 10, 2016, 10:38:10 PM »
I have a set of motor mount frame brackets that I bought from GM years ago. One has part #3980941 stamped in it and it measures 1 7/8" to the center line of the mount bolt when laid flat on the bench. The other one is not stamped clearly so I can not read the part # it measures 1 3/8" to the bolt center when flat on the bench. I bought these as a pair and was wondering if anyone could verify these measurements.

ko-lek-tor

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Re: 1969 Big Block Motor Mount Brackets?
« Reply #1 on: March 10, 2016, 11:37:44 PM »
This will help you somewhat on ID of correct mounts and showing you the part numbers you have and the application
http://www.camaros.net/forums/18-engine/36894-motor-frame-mounts.html
James to strangers, Bentley to friends
1969 SS/RS 396 coupe Hugger Orange X22 712 bought in 79
1969 SS 350 coupe LeMans Blue 713 bought in 79
1969 307 4spd. coupe Daytona Yellow 711 bought in 85

bcmiller

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Re: 1969 Big Block Motor Mount Brackets?
« Reply #2 on: March 14, 2016, 12:23:32 AM »
I have a set of motor mount frame brackets that I bought from GM years ago. One has part #3980941 stamped in it and it measures 1 7/8" to the center line of the mount bolt when laid flat on the bench. The other one is not stamped clearly so I can not read the part # it measures 1 3/8" to the bolt center when flat on the bench. I bought these as a pair and was wondering if anyone could verify these measurements.

The original part numbers for the frame mount brackets and the engine mounts can be found here at this link.
http://www.camaros.org/engine.shtml#EngineMounting

The part number you listed, replaced the original number for the 69 big block Camaro (and 1970 big block Nova) left side frame mount bracket (3950113) in October of 1970. 

The other part number on the other frame mount you have is probably 3980942.

I hope this helps.
Bryon / 1968 Camaro SS 396 - now 468 ci, M21, 12 bolt
Looking for 68 Camaro with body number NOR 181016

z28z11

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Re: 1969 Big Block Motor Mount Brackets?
« Reply #3 on: March 14, 2016, 04:00:56 AM »
I have a set of motor mount frame brackets that I bought from GM years ago. One has part #3980941 stamped in it and it measures 1 7/8" to the center line of the mount bolt when laid flat on the bench. The other one is not stamped clearly so I can not read the part # it measures 1 3/8" to the bolt center when flat on the bench. I bought these as a pair and was wondering if anyone could verify these measurements.


I've got a couple of pairs of these NOS - I'll dredge these out tomorrow and measure them for you. Pretty sure your offset is correct as noted -

Regards,
Steve
1968 Z28 M21/U17 BRG/W
1969 Z28 X77/M20/VE3 LeMans/W
1969 L78 X66/N66 Cortez/BVT
1969 Z11 L48/M35/C60/C06