Mickey - Any way you may be able to scan that template and post it as a PDF? That would be an excellent resource for the many folks that want to install an antenna but can't get the template (they are not easily found).
Bill - I took a peek through my 1955-59 Chevy FAM (electronic copy) and found no reference or resource on the radio or antenna in there. I do have an original 1957 Chevy Accessory Installation Reference Manual and can snap pics to post of the 2 instruction pages that describe the install using the hole template. The instructions cover the "rest of the story" on the install beyond the hole placement/drilling. The Chevy book should mirror the GMC I think.
