Hello, I have a 1964 Lesabre that had a 300 ci in it, but is beyond my budget for repair. I have found a 1955 264 that was running not too long ago. My question is will the ‘55 264 bolt up to my ‘64 automatic transmission? The 264 had a 3 speed behind it so I also want to know if my 300 flex plate will bolt on to the 264? I hope that’s not too confusing. Any help will be greatly appreciated!