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Old 11-17-2015, 08:55 PM   #1
Harleygolf1
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BB motor mounts

Will I need to trim the frame rails in order to get these to mount?
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Old 11-17-2015, 09:10 PM   #2
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Re: BB motor mounts

never seen that before. are you sure your main crossmember is installed correctly?
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Old 11-17-2015, 09:26 PM   #3
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Re: BB motor mounts

I'm eyeballing the mount itself it looks like it is bent at the one bolt hole something cant be right aside from the mount don't go cutting her up just yet
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Old 11-17-2015, 09:30 PM   #4
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Re: BB motor mounts

Factory BB mounts should bolt right in. Almost looks like you have it on the wrong side? Something isn't right...
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Old 11-17-2015, 09:33 PM   #5
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Re: BB motor mounts

interesting. my truck is a factory big block with the original towers. were the frames notched like this from the factory?

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Old 11-17-2015, 09:35 PM   #6
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Re: BB motor mounts

Well I had small block motor mounts on the frame and just bought these from another member on here as my plan is the put a big block in the truck. Any other thoughts they certainly don't line up without trimming?

Your post tells me that I need to trim the frame rail?
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Old 11-17-2015, 09:38 PM   #7
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Re: BB motor mounts

here's another pic i had saved of a factory big block truck. it sure seems like you need to trim the frame. i learned something new today.

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Old 11-17-2015, 09:48 PM   #8
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Re: BB motor mounts

Thank you, it looks like we both learned something!
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Old 11-17-2015, 09:53 PM   #9
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Re: BB motor mounts

you peaked my curiosity so i did some digging. found a thread with some good info. my guess (i could be wrong) is you have a 67 frame. 68 was the first year of big blocks, the frames may have all been clearanced for both sbc and bbc engines 68 and up.

http://67-72chevytrucks.com/vboard/s...d.php?t=578644
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Project "Little Sister" (70 c10 blue original paint refresh)
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Old 11-17-2015, 09:55 PM   #10
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Re: BB motor mounts

Your truck must be a 67. The 67's have to trim for BB mounts, BB's first came on 68 models.
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Old 11-18-2015, 10:36 AM   #11
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Re: BB motor mounts

Quote:
Originally Posted by john View Post
your truck must be a 67. The 67's have to trim for bb mounts, bb's first came on 68 models.
correct....
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Old 11-18-2015, 11:16 AM   #12
chevyblue72
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Re: BB motor mounts

I remember reading about the wider frames on the front of the 67's in a header fitment thread. Could that mount slip in and bolt from the underside of the frame.
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Old 11-18-2015, 11:58 AM   #13
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Re: BB motor mounts

I know I'm new here, but have done a ton of framework. Make sure if you do trim the rails, you don't use heat, AND make sure you radius the cuts like they did at the factory. Sharp angles gather stresses, and then cracks...you don't want that.
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