The body bushing frame mounts on my 65' need to be repaired. The holes are enlarged from rust. I plan on welding washers in place over the enlarged hole. I saw in the other post that the washers have a 1 1/2" inner diameter. Is this the correct hole size for the mounts for the front under the firewall. I don't have any body bushings to determine the size, and I plan on fixing this over the weekend. Thanks.