Sorry it took so long to get back to you. I didn’t see a message till now. I’m assuming then that the baseplate section that goes through the wheel opening is 2.5 inches across? I’m confused because if the jack is truly a 1965, the base should fit as all wheels were 13 inch. I have a jack and baseplate that looks just like yours but it’s for a 67-69 Barracuda. The baseplate center is too large as well. Could it be possible that your jack is a 67-69?