The side mounting brackets for your GMC (both 39 and 40)with the GMC engine were mounted at an angle. The Chevy's brackets are mounted straight. I do have a chev radiator in my 40, but had to transfer the GMC side mounts the the Chev radiator to make it work. I do not see any direct fit radiators on Ebay.
Last edited by gmc-is-me; 10/16/2023 8:04 PM. Reason: just checking
