These core supports go under the bracket that is on top of the radiator.
It is hard to get things out of the manual on these older trucks because the manual basically says, "remove radiator."
So I tried to find different info that should help. Here is a guide that just walks through radiator replacements:
https://www.2carpros.com/articles/how-to-replace-a-car-radiator
Hopefully the pictures below will give the detail that you need. This is off an 85 K10 but should be the same as your truck.
If the bushings you have are not fitting tightly in this place then I am thinking they may not be for your specific engine. I believe the radiators and brackets were different sizes for the different size engines.
So your engine being the largest available, it may not have had the same size radiator. Most likely it was a larger radiator with larger brackets so the smaller engine supports will not fit correctly.
Please see the pictures attached for the brackets that these supports go under.
They should be a form fitting item so maybe if you get a couple pictures of what your supports look like on the vehicle we can see if it is the part or something else that is the issue.
Thanks
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Monday, August 30th, 2021 AT 5:48 PM